How to show a while loop using a flow chart in JavaScript?

The purpose of a while loop is to execute a statement or code block repeatedly as long as an expression is true. Once the expression becomes false, the loop terminates. Let's see how to show while loop using flowchart in JavaScript.

While Loop Flowchart

The flowchart below illustrates the execution flow of a while loop:

How the While Loop Works

The flowchart demonstrates the while loop execution process:

• Start: Program execution begins
• Condition Check: The loop condition is evaluated
• True Path: If condition is true, execute the loop body
• Loop Back: After execution, return to condition check
• False Path: If condition is false, exit the loop
• End: Program continues after the loop

Example

let count = 1;

while (count 

Count is: 1
Count is: 2
Count is: 3
Loop ended


Key Points

• The condition is checked before each iteration
• If the condition is initially false, the loop body never executes
• Always ensure the condition eventually becomes false to avoid infinite loops
• The loop variable should be modified inside the loop body

Conclusion

The while loop flowchart shows the iterative nature of the loop - it continues executing as long as the condition remains true. Understanding this flow helps in writing effective loop logic and avoiding common pitfalls like infinite loops.