Javascript While loop

This loop will execute until the condition is given false.

Syntax:-


while(condition){
	
	// logic implement
}

Example:- Now, you have to print the i value until the i value not more than 20.


var i=0;
while(i<=20){
	
	console.log(i);
	i++;
}
Output:-
0
1
.
.

19
20

Example:- Now, you have to print the even i value until the i value not more than 10.


var i=2;
while(i<=10){
  
  if(i%2 ==0){
    console.log(i);
  }
  
  i++;
}
Output:-
2
4
6
8
10

Javascript While loop – Interview Questions

Q 1: What is a while loop?
Ans: Executes while the condition is true.
Q 2: Is it entry-controlled?
Ans: Yes.
Q 3: When to use a while loop?
Ans: When iterations are unknown.
Q 4: Can a while loop run infinitely?
Ans: Yes, if the condition is always true.
Q 5: Is a break supported?
Ans: Yes.

Javascript While loop – Objective Questions (MCQs)

Q1. The while loop checks the condition ______.






Q2. The while loop is used when the number of iterations is ______.






Q3. If the condition is false initially, the loop will execute ______.






Q4. Which keyword skips the current iteration?






Q5. A missing condition update may cause ______.