Also, a function expression does not have to be stored in a variable to be used, you can invoke it immediately. This is known as an 'immediately invoked function expression' or IIFE
(function (name) { console.log('Hello ' + name) })('World')
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Also, a function expression does not have to be stored in a variable to be used, you can invoke it immediately. This is known as an 'immediately invoked function expression' or IIFE