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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Giving Information to Functions

Passing a function directly as an argument / parameter to another function

Can I passed a function directly as an argument / parameter to another function like the example below:

function calculateSomething (getRandomNumber()) {
  // Do some calculation and return it

Without specifying the parameter name, can this be done?

1 Answer

Michael Liendo
Michael Liendo
15,326 Points

Sort of. Since your defining a function---by using the "function" keyword, you want to give your parameter a value like int/string, bool, array, object. You can pass in a called function, but it should resolve to one of those types.

So in the end, your function should like look:

function calculateSomething(randomNumber) { //notice I'm not calling randomNumber, just naming the parameter
    //do some calculation with the random number

and then call the function like:

// here I'm calling calculateSomething and calling it with function that will resolve to a number