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‎2.1_Python_Numbers.py

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#Mathematical Functions in Python | Set 1 (Numeric Functions)
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# 1)ceil() and floor()
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# importing "math" for mathematical operations
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'''import math
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a = 2.3
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# returning the ceil of 2.3
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print ("The ceil of 2.3 is : ", end="")
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print (math.ceil(a))
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# returning the floor of 2.3
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print ("The floor of 2.3 is : ", end="")
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print (math.floor(a))'''
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# 2) Python code to demonstrate the working of
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# fabs() and factorial()
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# importing "math" for mathematical operations
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'''import math
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a = -10
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b= 5
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# returning the absolute value.
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print ("The absolute value of -10 is : ", end="")
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print (math.fabs(a))
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# returning the factorial of 5
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print ("The factorial of 5 is : ", end="")
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print (math.factorial(b))'''
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# Python code to demonstrate the working of
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# copysign() and gcd()
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# importing "math" for mathematical operations
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'''import math
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a = -10
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b = 5.5
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c = 15
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d = 5
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# returning the copysigned value.
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print ("The copysigned value of -10 and 5.5 is : ", end="")
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print (math.copysign(5.5, -10))
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# returning the gcd of 15 and 5
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print ("The gcd of 5 and 15 is : ", end="")
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print (math.gcd(5,15))'''
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# Python code to demonstrate the working of
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# exp() and log()
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# importing "math" for mathematical operations
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'''import math
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# returning the exp of 4
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print ("The e**4 value is : ", end="")
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print (math.exp(4))
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# returning the log of 2,3
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print ("The value of log 2 with base 3 is : ", end="")
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print (math.log(2,3))'''
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# Python code to demonstrate the working of
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# log2() and log10()
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# importing "math" for mathematical operations
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'''import math
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# returning the log2 of 16
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print ("The value of log2 of 16 is : ", end="")
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print (math.log2(16))
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# returning the log10 of 10000
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print ("The value of log10 of 10000 is : ", end="")
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print (math.log10(10000))'''
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# Python code to demonstrate the working of
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# pow() and sqrt()
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# importing "math" for mathematical operations
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'''import math
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# returning the value of 3**2
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print ("The value of 3 to the power 2 is : ", end="")
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print (math.pow(3,2))
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# returning the square root of 25
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print ("The value of square root of 25 : ", end="")
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print (math.sqrt(25))'''
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# Python code to demonstrate the working of
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# sin() and cos()
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# importing "math" for mathematical operations
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'''import math
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a = math.pi/6
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# returning the value of sine of pi/6
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print ("The value of sine of pi/6 is : ", end="")
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print (math.sin(a))
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# returning the value of cosine of pi/6
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print ("The value of cosine of pi/6 is : ", end="")
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print (math.cos(a))'''
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# Python code to demonstrate the working of
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# tan() and hypot()
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# importing "math" for mathematical operations
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'''import math
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a = math.pi/6
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b = 3
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c = 4
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# returning the value of tangent of pi/6
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print ("The value of tangent of pi/6 is : ", end="")
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print (math.tan(a))
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# returning the value of hypotenuse of 3 and 4
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print ("The value of hypotenuse of 3 and 4 is : ", end="")
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print (math.hypot(b,c))'''
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# Python code to demonstrate the working of
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# degrees() and radians()
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# importing "math" for mathematical operations
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'''import math
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a = math.pi/6
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b = 30
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# returning the converted value from radians to degrees
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print ("The converted value from radians to degrees is : ", end="")
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print (math.degrees(a))
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# returning the converted value from degrees to radians
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print ("The converted value from degrees to radians is : ", end="")
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print (math.radians(b))'''
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# Python code to demonstrate the working of
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# gamma()
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# importing "math" for mathematical operations
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'''import math
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a = 4
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# returning the gamma() of 4
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print ("The gamma() of 4 is : ", end="")
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print (math.gamma(a))'''
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# Python code to demonstrate the working of
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# const. pi and e
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# importing "math" for mathematical operations
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'''import math
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# returning the value of const. pi
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print ("The value of const. pi is : ", end="")
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print (math.pi)
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# returning the value of const. e
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print ("The value of const. e is : ", end="")
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print (math.e)'''
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# Python code to demonstrate the working of
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# inf, nan, isinf(), isnan()
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# importing "math" for mathematical operations
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'''import math
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# checking if number is nan
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if (math.isnan(math.nan)):
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print ("The number is nan")
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else : print ("The number is not nan")
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# checking if number is positive infinity
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if (math.isinf(math.inf)):
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print ("The number is positive infinity")
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else : print ("The number is not positive infinity")'''
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‎2.2 .a Python Lists.py

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"""#1)List Index
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my_list = ['k','a','r','t','h','i','k']
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# Output: k
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print(my_list[0])
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# Output: r
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print(my_list[2])
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# Output: h
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print(my_list[4])
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# Output: 1
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print(my_list.index('a'))
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# Output: 2
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print(my_list.count('k'))
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# Error! Only integer can be used for indexing:type error
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print(my_list[4.0])
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# Nested List
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n_list = ["Happy", [2,0,1,5]]
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# Nested indexing
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# Output: a
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print(n_list[0][1])
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# Output: 5
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print(n_list[1][3])"""
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#2)Negative indexing
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"""my_list = ['k','a','r','t','h','i','k']
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# Output: k
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print(my_list[-1])
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# Output: r
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print(my_list[-5])"""
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#We can access a range of items in a list by using the slicing operator (colon).
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"""my_list = ['k','a','r','t','h','i','k',]
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# elements 3rd to 5th
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print(my_list[2:5])
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# elements beginning to 4th
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print(my_list[:-5])
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# elements 5th to end
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print(my_list[5:])
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# elements beginning to end
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print(my_list[:])"""
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#We can use assignment operator (=) to change an item or a range of items.
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"""# mistake values
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even = [2, 4, 6, 8]
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# change the 1st item
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even[0] = 1
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# Output: [1, 4, 6, 8]
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print(even)
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# change 2nd to 4th items
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even[1:4] = [3, 5, 7]
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# Output: [1, 3, 5, 7]
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print(even)"""
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#We can add one item to a list using append() method or add several items using extend() method.
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"""odd = [1, 3, 5]
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odd.append(7)
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# Output: [1, 3, 5, 7]
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print(odd)
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odd.extend([9, 11, 13])
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# Output: [1, 3, 5, 7, 9, 11, 13]
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print(odd)"""
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#We can also use + operator to combine two lists. This is also called concatenation.
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#The * operator repeats a list for the given number of times.
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""""odd = [1, 3, 5]
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# Output: [1, 3, 5, 9, 7, 5]
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print(odd + [9, 7, 5])
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#Output: ["re", "re", "re"]
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print(["re"] * 3)"""
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#insert one item we use can insert() method
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"""odd = [1, 9]
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odd.insert(1,3)
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# Output: [1, 3, 9]
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print(odd)
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odd[2:2] = [5, 7]
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# Output: [1, 3, 5, 7, 9]
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print(odd)"""
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#We can delete one or more items from a list using the keyword del.
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"""my_list = ['p','r','o','b','l','e','m']
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# delete one item
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del my_list[2]
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# Output: ['p', 'r', 'b', 'l', 'e', 'm']
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print(my_list)
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# delete multiple items
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del my_list[1:5]
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# Output: ['p', 'm']
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print(my_list)
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# delete entire list
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del my_list
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# Error: List not defined
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print(my_list)"""
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#We can also use the clear() method to empty a list.
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"""my_list = ['p','r','o','b','l','e','m']
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my_list.remove('p')
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# Output: ['r', 'o', 'b', 'l', 'e', 'm']
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print(my_list)
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# Output: 'o'
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print(my_list.pop(1))
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# Output: ['r', 'b', 'l', 'e', 'm']
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print(my_list)
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# Output: 'm'
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print(my_list.pop())
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# Output: ['r', 'b', 'l', 'e']
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print(my_list)
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my_list.clear()
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# Output: []
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print(my_list)"""
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#We can test if an item exists in a list or not, using the keyword in.
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"""my_list = ['p','r','o','b','l','e','m']
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# Output: True
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print('p' in my_list)
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# Output: False
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print('a' in my_list)
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# Output: True
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print('c' not in my_list)"""
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#Using a for loop we can iterate though each item in a list.
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"""for fruit in ['apple','banana','mango']:
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print("I like",fruit)"""
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