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What is the difference between let and var in JavaScript? Pending Review
Asked on Jun 05, 2026
Answer
In JavaScript, "let" and "var" are both used to declare variables, but they have different scoping rules and behaviors. "let" is block-scoped, while "var" is function-scoped.
function example() {
if (true) {
let blockScoped = "I am block-scoped";
var functionScoped = "I am function-scoped";
}
console.log(blockScoped); // ReferenceError: blockScoped is not defined
console.log(functionScoped); // "I am function-scoped"
}
example();Additional Comment:
✅ Answered with JavaScript best practices.- "let" is block-scoped, meaning it is only accessible within the block it is defined (e.g., inside an "if" statement).
- "var" is function-scoped, meaning it is accessible throughout the entire function in which it is declared.
- Using "let" is generally preferred in modern JavaScript for its predictable scoping behavior.
- "let" also prevents variable hoisting issues that can occur with "var".
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