Javascript program to validate if the user input matches a single value in an array

Currently, I am working with an array:

var something = ["1","2","3","4"] ;

My plan is to prompt the user to select a number. If the chosen number matches any value in the array, I want to trigger a specific action.

Here's my dilemma: How can I verify if the user's input matches any value within the array?

if(something === "input"){
    console.log("Good choice!");
}

Obviously, the current if statement I have won't work. How can I make it check each value in the array to see if there is a match?

It would be fantastic if someone could assist me with this issue! ;)

Thanks in advance!

javascriptarraysif-statement

Answer №1

One useful feature of arrays in JavaScript is the presence of the indexOf method. This method returns the index of a specified argument within the array, or -1 if the argument is not found:

if (arr.indexOf(element) > -1) {
    // Element found in the array!
}

It's important to note that some older web browsers do not support this method, but a polyfill is available in the linked MDN article for compatibility.

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