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do while | Loops
Introduction to JavaScript

do whiledo while

Let's consider the do-while loop. This loop is similar to the while loop but has a key distinction.

whiledo-while
Executes code block after the condition check.Executes code block before the condition check.

Syntax

The do-while loop begins with the do keyword, encloses the code block within curly braces {}, and concludes with the while keyword followed by the condition in parentheses () without the need for an additional code block:

Here's an example:

At the outset, the variable a was initialized to 0, and the condition a >= 1 was evaluated after the a++ operation.

The code block within the do is guaranteed to be executed at least once:

Note

Including the end-of-command (;) after the do code block will lead to a SyntaxError.

The do-while loop is particularly useful when you need to prompt the user for input at least once and continue until the user enters valid data or meets a specific condition.

Everything was clear?

Section 5. Chapter 2
course content

Course Content

Introduction to JavaScript

do whiledo while

Let's consider the do-while loop. This loop is similar to the while loop but has a key distinction.

whiledo-while
Executes code block after the condition check.Executes code block before the condition check.

Syntax

The do-while loop begins with the do keyword, encloses the code block within curly braces {}, and concludes with the while keyword followed by the condition in parentheses () without the need for an additional code block:

Here's an example:

At the outset, the variable a was initialized to 0, and the condition a >= 1 was evaluated after the a++ operation.

The code block within the do is guaranteed to be executed at least once:

Note

Including the end-of-command (;) after the do code block will lead to a SyntaxError.

The do-while loop is particularly useful when you need to prompt the user for input at least once and continue until the user enters valid data or meets a specific condition.

Everything was clear?

Section 5. Chapter 2
some-alt