operations and prefix,postfix added ...

Wcoder547 · Wcoder547 · commit 15fa368da4d2 · 2024-05-06T09:03:41.000+05:00
diff --git a/01_basics/dataType_conversion_issues.js b/01_basics/dataType_conversion_issues.js
@@ -22,7 +22,60 @@ let checkIt = Number(isMarried);
 let check = ""; // false
 
 let checkBolean = Boolean(check);
-console.log(checkBolean); //it will give me true
+//console.log(checkBolean); //it will give me true
 
 // 1 => true , 0 => false
 // "hello" => true ,"" => false
+
+//***************************************  Operations ****************************************************** */
+
+let str1 = "waseem";
+let str2 = "akram";
+let str3 = str1 + str2;
+//console.log(str3);
+
+//console.log(typeof ("1" + 2)); //string
+//console.log(3 + 3 + "3"); //string 63
+
+//console.log("4" + 4 + 4); // string. 444
+
+//console.log(3 + ((4 * 5) % 2)); //3+(20%2)=>3+0=>3;
+//console.log(true); //give us true
+//console.log(+true); //1
+// console.log(true+); // which is not valid .
+
+let num1, num2, num3;
+num1 = num2 = num3 = 3 + 3;
+//console.table([num1, num2, num3]); // 6,6,6
+
+let gameInit = 200;
+gameInit++;
+//console.log(gameInit); //201
+
+//Must study Prefix and postfix ..
+
+let x = 3;
+const y = x++;
+//console.log(`x: ${x} y: ${y}`); //x:4 y:3 it will increment the value of only x  but y will remain only x ;
+//If used postfix, with operator after operand (for example, x++), the increment operator increments and returns the value before incrementing.
+
+let a = 4;
+const b = ++a;
+//console.log(`a : ${a} b : ${b}`); // a:5 b:5
+
+//If used prefix, with operator before operand (for example, ++x), the increment operator increments and returns the value after incrementing.
+
+//++(++x); // this is invalid..
+
+/************************** Examples of  Postfix & prefxix **************************** */
+//Postfix
+let x2 = 3n;
+const y2 = x2++;
+
+//console.log(`x2: ${x2} y2 : ${y2}`); // x2 is 4n; y2 is 3n
+
+//Prefix
+let x4 = 3n;
+const y4 = ++x4;
+
+console.log(`x4:${x4} y4:${y4}`); // x4 is 4n; y4 is 4n
