freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords/index.md

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Compare Scopes of the var and let Keywords

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Problem Explanation:

We need to change var to let in our function scope and add let to our block scope.

Hint: 1

• Find var and replace with let.

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• Add let to the variable i inside of your if statement.

try to solve the problem now

Spoiler Alert!

Solution ahead!

Basic Code Solution:

    function checkScope() {
      "use strict";
      let i = "function scope";
      if (true) {
        let i = "block scope";
        console.log("Block scope i is: ", i);
      }
    console.log("Function scope i is: ", i);
    return i;
    }

Run Code

Code Explanation:

By using let you can declare variables in relation to their scope.

Relevant Links

• let

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