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Apprentice

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Exam →Stats →Learning Path

Variables

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Exercises (10)

○Variables — let: mutable binding
Beginner
○Variables — const: object properties are mutable
Beginner
○Variables — let: block-scoped
Beginner
○Variables — var: function-scoped (not block-scoped)
Beginner
○Variables — destructuring assignment
Beginner
○Variables — var hoisting: undefined before declaration
Intermediate
○Variables — function declaration hoisting
Intermediate
○Variables — let temporal dead zone (TDZ)
Intermediate
○Variables — var in loop closures (the classic gotcha)
Intermediate
○Variables — let in loop closures (per-iteration binding)
Intermediate