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$ curl repovive.com/roadmaps/javascript/functions/scope-block

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$ curl repovive.com/roadmaps/javascript/functions/scope-block

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Scope - Block - Functions | JavaScript | Repovive

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JavaScript22 sections · 783 units18h total

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Scope - Block

Inside braces

Variables declared with let and const have block scope:

function example() {
  if (true) {
    let x = 10
    const y = 20
  }
  console.log(x)  // Error: x is not defined
}

Block scope means variables exist only within the {} where they're declared. This includes if statements, loops, and any other blocks.