Loops in Java

Loops are a key part of programming. They let us repeat a block of code multiple times. In Java, we have three main types of loops: for, while, and do-while.

For Loop

A for loop is used when we know how many times we want to repeat an action. Here’s the structure:

for (initialization; condition; increment/decrement) {
    // code to be executed
}

For example, if we want to print numbers from 1 to 5, we can do:

for (int i = 1; i <= 5; i++) {
    System.out.println(i);
}

While Loop

A while loop is used when we want to repeat an action until a certain condition is met. Here’s the structure:

while (condition) {
    // code to be executed
}

For example, if we want to print numbers from 1 to 5, we can do:

int i = 1;
while (i <= 5) {
    System.out.println(i);
    i++;
}

Do-While Loop

A do-while loop is similar to a while loop, but it checks the condition after executing the block of code. So, the code block will be executed at least once. Here’s the structure:

do {
    // code to be executed
} while (condition);

For example, if we want to print numbers from 1 to 5, we can do:

int i = 1;
do {
    System.out.println(i);
    i++;
} while (i <= 5);

Remember, it’s important to update the loop variable inside the loop, or else the loop might run forever!

I hope this helps you understand loops in Java. Happy coding! 😊

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