scope and closure javascript code example

Example 1: closures in javascript

function OuterFunction() {

    var outerVariable = 100;

    function InnerFunction() {
        alert(outerVariable);
    }

    return InnerFunction;
}
var innerFunc = OuterFunction();

innerFunc(); // 100

Example 2: closure and scope javascript

function outerFunction () {
  const outer = `I'm the outer function!`

  function innerFunction() {
    const inner = `I'm the inner function!`
    console.log(outer) // I'm the outer function!
  }

  console.log(inner) // Error, inner is not defined
}