Date and Math Object

JavaScript Date Objects

Date Objects are created with the new Date() constructor. There are 4 ways to create a new date object.

new Date()
new Date(year, month, day, hour, minutes, seconds, milliseconds)
new Date(milliseconds)
new Date(date string)

JavaScript Date Input

There are 3 types of JavaScript date input formats:

Type	Example
ISO Date	"2022-02-22"(The International Standard)
Short Date	"03/22/2022"
Long Date	"Mar 22 2022" or "22 Mar 2022"

Get Date Methods

1. getFullYear()

   Get the year as a four digit number (yyyy).

2. getMonth()

   Get the month as a number (0-11).

3. getDate()

   Get the date as a number (1-31).

4. getHours()

   Get the hour (0-23).

5. getMinutes()

   Get the minute (0-59).

6. getTime()

   Get the time (miliiseconds since 1 January 1970).

7. getDay()

   Get the weekday as a number (0-6).

8. Date.now()

   It returns the number of milliseconds since 1 January 1970.

9. getSeconds()

   Get the second (0-59).

10. getMilliseconds()

    Get the millisecond (0-999).

Set Date Methods

1. setDate()

   Set the day as a number (1-31).

2. setfullYear()

   Set the year (optionally month and date).

3. setMonth()

   Set the month (0-11).

4. setHours()

   Set the hour (0-23).

5. setMinutes()

   Set the minutes (0-59).

6. setSeconds()

   Set the seconds (0-59).

7. setMilliseconds()

   Set the milliseconds (0-999).

JavaScript Math Objects

The JavaScript Math object allows to perform mathematical tasks on numbers. The Math object has no constructor.

1. abs(x)

   Returns the absolute value of x.

2. acos(x)

   Returns the arccosine of x, in radians.

3. acosh(x)

   Returns the hyperbolic arccosine of x.

4. asin(x)

   Returns the arcsine of x, in radians.

5. asinh(x)

   Returns the hyperbolic arcsine of x.

6. atan(x)

   Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians.

7. atan2(y, x)

   Returns the arctangent of the quotient of its arguments.

8. atanh(x)

   Returns the hyperbolic arctangent of x.

9. cbrt(x)

   Returns the cubic root of x.

10. ceil(x)

    Returns x, rounded upwards to the nearest integer.

11. cos(x)

    Returns the cosine of x (x is in radians).

12. cosh(x)

    Returns the hyperbolic cosine of x.

13. exp(x)

    Returns the value of Ex.

14. floor(x)

    Returns x, rounded downwards to the nearest integer.

15. log(x)

    Returns the natural logarithm (base E) of x.

16. max(x, y, z, ..., n)

    Returns the number with the highest value.

17. min(x, y, z, ..., n)

    Returns the number with the lowest value.

18. pow(x, y)

    Returns the value of x to the power of y.

19. random()

    Returns a random number between 0 and 1.

20. round(x)

    Rounds x to the nearest integer.

21. sign(x)

    Returns if x is negative, null or positive (-1, 0, 1).

22. sin(x)

    Returns the sine of x (x is in radians).

23. sinh(x)

    Returns the square root of x.

24. sqrt(x)

    Returns the square root of x.

25. tan(x)

    Returns the tangent of an angle.

26. tanh(x)

    Returns the hyperbolic tangent of a number.

27. trunc(x)

    Returns the integer part of a number (x).