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JS Loop for
A for loop is used to run a block of code repeatedly for a specified number of times, based on a condition. It is one of the most common control structures in JavaScript.
Syntax:
for (initialization; condition; increment/decrement) {
// Code to execute
}
- Initialization: Sets the starting value for the loop variable.
- Condition: Specifies when the loop should stop (must evaluate to
falseto terminate the loop). - Increment/Decrement: Updates the loop variable after each iteration.
Iterating Over an Array
let fruits = ["Apple", "Banana", "Cherry"];
for (let i = 0; i < fruits.length; i++) {
console.log(fruits[i]);
}
Looping in Reverse
for (let i = 5; i > 0; i--) {
console.log("Iteration number:", i);
}
Nested for Loop
for (let i = 1; i <= 3; i++) {
for (let j = 1; j <= 2; j++) {
console.log(`Outer loop: ${i}, Inner loop: ${j}`);
}
}