javaScript do while loop

        

 JavaScript  Do While loop 

what is the Javascript  do .. While loop?

1] The do...while loop in JavaScript is a control flow statement that continually runs a block of code until a given condition is evaluated to false. 

2] While a do...while loop is similar to a while loop, the main distinction is that the code block is run at least once before the condition is verified.

Syntax :-

do 

{

code executed

}

while (condition)

do :-

1] keyword starts the loop.

2] block of code executed first.

while :-

1] keyword condition that is evaluated after execute of the block of code.

2] condition evaluates true  block of code executed again than condition false the loop terminates.

FlowChar :-

 Do while loop

javascript  do while loop 

1] Example

Q.  Display  Number 10 to 1 

Source code

let a=10;

do{

    console.log(a);

    a--;

}while (a>0);

Explain program :-

1] a starts at 10 .

2] loop prints value of a and decrement (a--) after each iteration 

3] condition run long i  greater than 0

Display  Number 10 to 1 

Output 

JavaScript do  while loop 

2] Example

Q. display number 11 to 20 using do.. while loop

let i = 11;

do {

  console.log(i);

  i++;

} while (i <= 20);

JavaScript  do while loop 

Output :-

JavaScript  do while loop 

3] Example

Q. user input using do while loop

let input ;

do {

    input =prompt("Enter a no between 1 to 100 ");

}

while (input <1 || input > 100 );

console.log("enter your number- " +input);

JavaScript Do while loop

Output:- 

JavaScript do while loop 

4] Example

Q. javascript that iteration 28 times 

let count =0;

do {

    console.log("count number-", count);

    count++;

}

while(count<28);

JavaScript  do while loop 

 Output:-

Related Post :-

php program to print alphabet pattern R

php program to print half diamond pattern

javascript operators

how to create a navigation bar