Loop

When we want to repeat the same code over different values, we generally use a programming constructs loop.

What are types of loop?

1. Entry Control Loop(condition checked in the starting of loop e.g. for, while)

2. Exit Control Loop( condition check at end of loop e.g. do while) JavaScript support 3 basic loops construct for syntax of for loop:-

3. for Loop

   for (initialization; condition; increment / decrement) {
     // code block to be executed
   }

4. while Loop

   Initialization;
   while (condition) {
     // code block to be executed
     increment / decrement;
   }

5. do...while Loop

   initialization;
   do() {
       // code block to be executed
       increment/decrement;
   }while(condition)

6. for of [es6 introduce]

   for (element of arrayName) {
     // code block
   }
   // E.g.
   const array = [1, 2, 3, 4, 5, 6, 7];
   for (const element of array) console.log(element);
   // output 1 2 3 4 5 6 7