Learn Intermediate Java/

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for Loop

for Loop

In this lesson, the concept and implementation of for loops and nested for loops in Java is explained.

We'll cover the following...

for loop: syntax

The for loop is a loop that lets a programmer control exactly how many times a loop will iterate.

The syntax is as follows:

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for (expression for initialization ; expression for testing ; expression for updating) {
  //body
}

Here is an example of how the for loop works:

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class Loops {
    public static void main(String args[]) {
        for (int i = 0; i < 10; ++i) {
            // for loop iterates 10 times
            System.out.println("value of i = " + i);
        }
    }
}

Take a look at the illustration below to understand the code above more clearly.

The for loop code above and the while below are more or less equivalent.

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class Loops {
    public static void main(String args[]) {
        int i = 0;
        while (i < 10) // while loop runs till i is less then 10 just like in for loop
        {
            System.out.println("value of i =  " + i); //prints value of i
            i++;
        }
    }
}

What does the for loop do?

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