This post is a part 1 of ECMAScript 6 Complete Tutorial post series.
“let” keyword was introduced in ES6. It lets you define block scope(bracket scope) variables in JavaScript. Initially JavaScript only supported function scope and global scope variables.
Here is an example code
if(true)
{
let x = 12;
alert(x); //alert's 12
}
alert(x); //x is undefined here
{
let x = 12;
alert(x); //alert's 12
}
alert(x); //x is undefined here
“let” keyword limits the variables accessibility upto a block, statement or expression.
