let in javascript
The let statement declares a block scope local variable, optionally initializing it to a value.
let x = 1;
if (x === 1) {
let x = 2;
console.log(x);
// expected output: 2
}
console.log(x);
// expected output: 1let in javascript
The let statement declares a block scope local variable, optionally initializing it to a value.
let x = 1;
if (x === 1) {
let x = 2;
console.log(x);
// expected output: 2
}
console.log(x);
// expected output: 1var or const in javascript
// var declares a variable, meaning its value will vary.
// const declares a constant, meaning its value will remain
// consistant and not change.
// If your variable changes throughout the program or website,
// declare it using a var statement.
// Otherwise, if its value does not change, declare it using
// a const statement.
const myConst='A const does not change.';
var myVar='A var does change.';
var myVar=2;var let const javascript
// `let` vs `var` vs `const` in 'javascript'
"let" allows you to declare local variable whose scope
is limited to the block statement.
"var" allows you to declare a variable globally or locally
to an entire function.
"Const" just like let, are block-scoped.
It's value can't be reassigned and it can't be redeclared.what is the different between var and let and const in js
var tester = "hey hi";
function newFunction() {
var hello = "hello";
}
console.log(hello); // error: hell
o is not definedCopyright © 2021 Codeinu
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