Closure function in JS

JavaScript Nested Function : A function can also contain another function. This is called nested function. function greet ( name ) { function displayName () { console . log ( " Hi " + name ) } displayName (); } greet ( " Varun " ); Output : Hi Varun Returning a function : In JavaScript, it is allowed to return a function within a function. function greet ( name ) { function displayName () { console . log ( " Hi " + name ) } return displayName ; //returning a function } const g1 = greet ( " Varun