How to use While Loop in C#

What is an iteration?

In programming some problems require the repetition of some instructions.
A loop is a basic programming construct that allows repeated execution of instructions.
In this course, we will focus on while and for loops.

While Loop

One of the simplest and most commonly used loops is the "while" loop:

You must specify the three actions:

• Initialization: a one-time expression that defines the initial value of the counter. Before the start of the while loop.
• Condition: A Boolean expression to be tested. If true, the loop iterates.
• Update: increase or decrease the value of the counter, in the body of the while loop:
  

Example

Write an algorithm/pseudocode for an application that uses a while loop display numbers from 0 to 9 in a List-box.

• Set counter to 0
• while counter ≤ 9
• Display counter
• counter = counter + 1

The C# code for this example is as follows:

		// Declare & Initialize the counter 
		int counter = 0; 
		// Execute the loop body while the loop condition is true
		while (counter ≤ 9) 
		{ 
			lstNumbers.Items.Add("Number : " + counter);  // Display the counter value 
			counter++; 	// Increase the counter by 1
		}