JavaScript/Basic/4var.js at main · AZAD-CYBER/JavaScript

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The var statement declares a function-scoped or globally-scoped variable, optionally initializing it to a value.

var myVariable = 5;

var myVariable = 10;

console.log(myVariable); //Will output 5

var x = 1;

if (x === 1) {

var x = 2;

console.log(x);

// Expected output: 2

}

console.log(x);

// Expected output: 2

("use strict");

function foo() {

var x = 1;

function bar() {

var y = 2;

console.log(x); // 1 (function `bar` closes over `x`)

console.log(y); // 2 (`y` is in scope)

}

bar();

console.log(x); // 1 (`x` is in scope)

console.log(y); // ReferenceError, `y` is scoped to `bar`

}

foo();

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