block scope in JavaScript

What this snippet does

let and const are confined to the block they are declared in — curly braces create a new scope.

Expected output

inside
also inside
outside: no access

Why practise typing this

Typing scope 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

• lexical scopeScope · beginner
• let vs constVariables · beginner
• const configVariables · beginner
• const mutationVariables · beginner
• var hoistingVariables · beginner
• var scope leakVariables · intermediate