Here’s a comparison between the while and do-while loops in tabular format:
| Feature | while Loop | do-while Loop |
|---|---|---|
| Syntax | while (condition) {<br> // Code block<br>} | do {<br> // Code block<br>}<br>while (condition); |
| Initial Execution | Condition is evaluated first; if false, loop body is skipped | Loop body is executed first, regardless of condition |
| Condition Check | Checked before entering loop body | Checked after executing the loop body |
| Minimum Iteration | May not execute loop body if condition is false initially | Always executes the loop body at least once |
| Use Case | Suitable when the loop body may not need to execute initially | Useful when the loop body must execute at least once initially |
Both while and do-while loops are valuable looping constructs in C programming, each with its own use cases and behavior. Understanding their differences is essential for choosing the appropriate loop construct for a given programming scenario.