JavaScript loop
loops in JavaScript | AsgarTech
In JavaScript, loops are used to execute a block of code repeatedly until a specific condition is met. There are mainly three types of loops in JavaScript: for, while, and do-while loops. Here are some examples:
for loop
The for loop is used when you know how many times you want to execute a block of code.
Syntax:
for (initialization; condition; increment) {
// code to be executed
}
Example:
for (let i = 0; i < 5; i++) {
console.log("The value of i is: " + i);
}
Output:
The value of i is: 0
The value of i is: 1
The value of i is: 2
The value of i is: 3
The value of i is: 4
while loop
The while loop is used when you do not know the number of times you want to execute a block of code, but you have a condition that needs to be satisfied.
Syntax:
while (condition) {
// code to be executed
}
Example:
let i = 0;
while (i < 5) {
console.log("The value of i is: " + i);
i++;
}
Output:
The value of i is: 0
The value of i is: 1
The value of i is: 2
The value of i is: 3
The value of i is: 4
do-while loop
The do-while loop is similar to the while loop, but the block of code is executed at least once, even if the condition is false.
Syntax:
do {
// code to be executed
} while (condition);
Example:
let i = 0;
do {
console.log("The value of i is: " + i);
i++;
} while (i < 5);
Output:
The value of i is: 0
The value of i is: 1
The value of i is: 2
The value of i is: 3
The value of i is: 4
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