What are the differences between do-while loops and while loops in programming?
Understand the Problem
The image provides a comparison between do-while and while loops in programming. It outlines key differences, such as control type, condition checking, execution behavior, and suitability for different scenarios.
Answer
do-while is exit-controlled, checks condition at the end, and executes at least once; while is entry-controlled, checks condition at the beginning, and may not execute at all.
The primary differences are: (1) do-while is an exit-controlled loop, while while is an entry-controlled loop; (2) do-while checks the test condition at the end, while checks it at the beginning; (3) do-while loops execute at least once, while loops only execute if the condition is true.
Answer for screen readers
The primary differences are: (1) do-while is an exit-controlled loop, while while is an entry-controlled loop; (2) do-while checks the test condition at the end, while checks it at the beginning; (3) do-while loops execute at least once, while loops only execute if the condition is true.
More Information
While loops check the loop condition before executing the loop's body and might not execute at all if the condition is false initially. In contrast, do-while loops ensure that the loop's body is executed at least once, as the condition is checked after the loop has executed.
Tips
Common mistakes include assuming do-while loops will behave the same as while loops in situations where initial conditions are false, and vice versa.
Sources
- Difference between while and do-while loop in C, C++, Java - geeksforgeeks.org
- Difference between "while" loop and "do while" loop - Stack Overflow - stackoverflow.com
- Difference between While and Do-While Loop - PrepBytes - prepbytes.com
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