How do I use the for loop statement?

By Wayan in Basic, Core API 0 Comment

The for loop can be used to iterate over a range of values. For instance if you want to iterate from 0 to 10 or if you want to iterate through all the items of an array. Below you’ll see two forms of a for loop. The first one is the general form of a for loop and the second one is an enhanced for loop that also known as the for..each loop.

The general form of for loop consists of three parts:

for (initialization; termination; increment) {
    ....
}
  • The initialization: it initializes the loop, it executed once at the beginning of the loop.
  • The termination: the loop executes as long as the termination evaluates to true.
  • The increment: it executed at the end of every loop, the expression can be either an increment or decrement.
package org.kodejava.basic;

public class ForDemo {
    public static void main(String[] args) {
        // Do a loop from 0 to 10.
        for (int i = 0; i <= 10; i++) {
            System.out.println("i = " + i);
        }

        // Loop through all the array items.
        int[] numbers = new int[]{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
        for (int number : numbers) {
            System.out.println("number = " + number);
        }
    }
}

The result of the program is:

i = 0
i = 1
i = 2
i = 3
i = 4
i = 5
i = 6
i = 7
i = 8
i = 9
i = 10
number = 0
number = 1
number = 2
number = 3
number = 4
number = 5
number = 6
number = 7
number = 8
number = 9
number = 10
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