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Java For Loop
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.
Basic For Loop
for (int i = 0; i < 5; i++) {
System.out.println("Iteration number:"+ i);
}
Nested For Loop
for (int i = 1; i <= 3; i++) {
for (int j = 1; j <= 2; j++) {
System.out.print(" "+i*j);
}
System.out.println();
}
Enhanced For Loop (For-Each Loop):
The for-each loop is used to iterate over arrays or collections without using an index. It's simpler and avoids potential errors with index handling.
Syntax:
for (dataType variable : arrayOrCollection) {
// Code to execute
}
Example
int[] numbers = {10, 20, 30, 40};
for (int num : numbers) {
System.out.println(num);
}