Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison table ...

Review declaring a function using a function expression Declare a function using arrow syntax Describe situations where arrow functions are used Evaluate the expression function() { return 'bar' }, ...

Note: the function above may be referenced before it has been defined. Functions are also values in JavaScript; they can be stored in variables (just like numbers, strings, etc ...) and given to other ...

Functions are self-contained routines that can be “called” elsewhere within your JavaScript code. Along with loops and conditionals, functions are an essential means of organizing software.

1. the basic javascript functionthe simplest way to declare a function in javascript. in below example. we have written a simple function called abcd(x,y) which is simply taking two parameters x and y ...

In javascrit,if you re-declare a variable, it wouldn't lose it value.example ->var a=10;var a;alert(a);output : 5here you can see, in javascript the output will be same but in other languages ...

This happens because the variable declaration is scoped to the if statement. In JavaScript, though, the same code is perfectly fine: This is because JavaScript scopes your variables to functions and ...