Chapter 5: Problem 9

What is the difference between a Do-while loop and a Do-Until loop?

Short Answer

Expert verified

Answer: The main differences between a Do-while loop and a Do-Until loop are the way they check their conditions and their execution behavior. In a Do-while loop, the loop continues to execute as long as the condition is true. On the other hand, a Do-Until loop continues to execute until the condition becomes true. Both loop structures execute the code block at least once, regardless of the initial condition, as they check the condition after the loop body is executed. The choice of using a particular loop depends on the problem being solved and the preference of the programmer.

Step by step solution

Definition of Do-while Loop

A Do-while loop is a type of loop structure in programming, which executes a block of code at least once and continues to execute the code as long as the specified condition remains true.

Definition of Do-Until Loop

A Do-Until loop is another type of loop structure in some programming languages, which also executes a block of code at least once but continues to execute the code as long as the specified condition remains false. Once the condition becomes true, the loop stops executing.

Contrast in Conditions

The main difference between these two loop structures is the way they check their conditions. In a Do-while loop, the loop continues to execute as long as the condition is true, whereas in a Do-Until loop, the loop continues to execute until the condition becomes true.

Loop Execution

Both Do-While and Do-Until loops execute the code block at least once, regardless of the initial condition, as the condition is checked after the loop body is executed. This differentiates them from regular While and For loops, which check the condition before entering the loop body.

Usage

The choice of using a Do-while loop or a Do-Until loop depends on the specific problem being solved in programming and the preference of the programmer. Some programming languages have a built-in Do-Until loop structure, while in others, you can emulate it using a Do-while loop with an inverted condition.

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What is the difference between a Do-while loop and a Do-Until loop?

Short Answer

Step by step solution

Definition of Do-while Loop

Definition of Do-Until Loop

Contrast in Conditions

Loop Execution

Usage

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