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Loops in Java

While Loop in Java:

public class WhileLoop {
	public static void main(String[] args) {
		int count = 0;

		// while loop
		while (count <= 10) {
			System.out.println(count);
			count++; //count = count + 1;
		}
	}
}

Output:

0
1
2
3
4
5
6
7
8
9
10

Find even number using wile loop and if statement:

public class WhileLoop {
	public static void main(String[] args) {
		int count = 1;
		while (count <= 10) {
			if ((count % 2) == 0) {
				System.out.println("Number: " + count +  " is even number");
			}
			count++; //count = count + 1;
		}
	}
}

Output:

Number: 2 is even number
Number: 4 is even number
Number: 6 is even number
Number: 8 is even number
Number: 10 is even number

For Loop in Java:

public class ForLoop {
	public static void main(String[] args) {
		int count;
		for (count = 1; count <= 10; count++)  {
			System.out.println(count);
		}
	}
}

Output:

0
1
2
3
4
5
6
7
8
9
10

Find even number using for loop and if statement:

public class ForLoop {
	public static void main(String[] args) {
		int count;
		for (count = 1; count <= 10; count++)  {
			if ((count % 2) == 0) {
				System.out.println("Number " + count + " is even");
			}
		}
	}
}

Output:

Number 2 is even
Number 4 is even
Number 6 is even
Number 8 is even
Number 10 is even

For loop using arrays:

public class ForLoopArray {
	public static void main(String[] args) {
		String[] colourNames = {"Red", "Green", "Yellow", "Blue"};
		for (String colour : colourNames) {
			System.out.println(colour);
		}
	}
}

Output:

Red
Green
Yellow
Blue

For loop using ListArray:

import java.util.ArrayList;
import java.util.List;

public class ForLoopArray {
	public static void main(String[] args) {

		List<String> colourNames = new ArrayList<String>();
		colourNames.add("Red");
		colourNames.add("Yellow");
		colourNames.add("Green");
		colourNames.add("Blue");

		for (String colour : colourNames) {
			
			System.out.println(colour);

		}

	}
}

Output:

Red
Yellow
Green
Blue