In this tutorial, I will give you many Examples of while loop in javascript. You only need to learn about the if-else statement and while loop in javascript.
Example 1: Javascript Program to Print the number from 1 to 10 using a while loop
var number = 10;
var i = 1;
while(i<=10)
{
console.log(i);
i++
}The output of the program is
1
2
3
4
5
6
7
8
9
10Example 2: Javascript program to print even numbers using a while loop
var number = 10;
var i = 1;
console.log("The Even numbers from 1 to 10 are: ");
while(i<=10)
{
if(i%2==0)
{
console.log(i);
}
i++
}The output of the program is
The Even numbers from 1 to 10 are:
2
4
6
8
10Example 3: Javascript program to print the sum of numbers from 1 to 10
var number = 10;
var i = 1;
var sum = 0;
while(i<=number)
{
sum = sum + i;
i++
}
console.log("The sum of numbers from 1 to 10 is: "+sum);The output of the program is
The sum of numbers from 1 to 10 is: 55Example 4: Javascript Program to display the multiplication table for a given integer using while loop.
var number = 3;
var i = 1;
var mul = 1;
console.log("The multiplication table of "+number+" is: ");
while(i<=10)
{
mul = number*i;
console.log(number+"*"+i+"="+mul);
i++
}The output of the program is
The multiplication table of 3 is:
3*1=3
3*2=6
3*3=9
3*4=12
3*5=15
3*6=18
3*7=21
3*8=24
3*9=27
3*10=30Example 5: Javascript program to print the factorial of a number using while loop.
var number = 4;
var i = 1;
var fact = 1;
while(i<=number)
{
fact = fact*i;
i++
}
console.log("The factorial of"+number+" is "+fact);The output of the program is
The factorial of4 is 24Example 6: Javascript program to find the sum of all even numbers from 1 to n using a while loop
var number = 10;
var i = 1;
var sum = 0;
while(i<=number)
{
if(i%2==0)
{
sum = sum + i;
}
i++
}
console.log("The sum of all even numbers from 1 to 10 is "+sum);The output of the program is
The sum of all even numbers from 1 to 10 is 30Example 7: Javascript program to find the perfect number using a while loop.
var number = 6;
var i = 1;
var sum = 0;
while(i<number)
{
if(number%i==0)
{
sum = sum + i;
}
i++
}
if(sum==number)
{
console.log(number+" is perfect number");
}
else{
console.log(number+" is not a perfect number");
}The output of the program is
6 is perfect numberExample 8: Javascript program to print the character from ‘a’ to ‘z’ and ‘A’ to ‘Z’ using while loop.
var number = 6;
var i = 65;
var sum = 0;
console.log("Chatacter from A to Z are:")
while(i<=90)
{
console.log(String.fromCharCode(i));
i++;
}
i = 97;
console.log("Chatacter from a to z are:")
while(i<=122)
{
console.log(String.fromCharCode(i));
i++;
}The output of the program is
Chatacter from A to Z are:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Chatacter from a to z are:
a b c d e f g h i j k l m n o p q r s t u v w x y zExample 9: Javascript program to print pyramid of a *
var str = "";
var i = 1;
while(i<=5)
{
var j = 1;
while(j<=i)
{
str= str + "*";
++j;
}
str += "\n";
++i;
}
console.log(str);The output of the program is
*
**
***
****
*****Example 10: Javascript program to print a pyramid of numbers using while loop.
var str = "";
var i = 1;
while(i<=5)
{
var j = 1;
while(j<=i)
{
str= str + j;
++j;
}
str += "\n";
++i;
}
console.log(str);The output of the program is
1
12
123
1234
12345
