while loops in JavaScript

What this snippet does

do-while always runs the body at least once; while may never run if the condition starts false.

Expected output

while: 0
while: 1
while: 2
do-while: 5

Why practise typing this

Typing loops code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

More JavaScript practice

• for loopLoops · beginner
• for...of loopLoops · beginner
• for...in loopLoops · beginner
• for...in arraysLoops · intermediate
• break/continueLoops · beginner
• let vs constVariables · beginner