What is a while loop?

• While loop is a pre-test loop which means the condition will be first checked then the statement will execute. 
• The while loop repeats the statement till the condition is true.
•  When the condition is false then execution comes out from the loop.

Key Points:

•  In the while loop,  based on the condition block statement is executed. 
•  it is also known as an entry control loop.

Syntax:

 while (condition){
     // code to be executed
   increment/decrement statement;    // i++
 }

Example:

package quipohouse;
class WhileLoop {
	public static void main(String args[]) {
		// initialization expression
		int i = 1;
		// test expression
		while (i < 4) {
			System.out.println("Quipo House");		
			i++;    // update expression
		}
	}
}

Output:

Quipo House
Quipo House
Quipo House