call inside function javascript code example

Example 1: does a function inside a function need to be called?

function outer() { 

    // when you define it this way, the inner function will be accessible only from 
    // inside the outer function

    function inner() {
        alert("hi");
    }
    inner(); // call it
}

Example 2: javascript function call with variable

function abc() {
  alert('test');
}

var funcName = 'abc';

window[funcName]();