Need for loop in Java

Why Do We Need Loops?

• In programs, we often need to do the same task repeatedly.
• Using only if-else is not suitable → it checks a condition only once.
• Writing the same statement again and again is cumbersome.

Example Without Loop

System.out.println("Hi");
System.out.println("Hi");
System.out.println("Hi");
System.out.println("Hi");

👉 Very repetitive and not efficient.

Example With Loop

for (int i = 1; i <= 4; i++) {
    System.out.println("Hi");
}

👉 Much shorter and easier to maintain.

Loops in Java

Java provides 3 main types of loops:

1. for loop → repeat code a fixed number of times.
2. while loop → repeat code while a condition is true.
3. do-while loop → similar to while, but executes at least once.

Key Idea:

Loops make code clean, efficient, and dynamic → we can run tasks multiple times programmatically instead of manually repeating code.