Question

How to check if a string contains only letters and numbers using RegEx in JavaScript

Answer 1

function isAlphanumeric(str) {
    // Define the regular expression for alphanumeric characters
    const alphanumericRegex = /^[a-zA-Z0-9]+$/;

    // Use the test() method to check if the string matches the pattern
    return alphanumericRegex.test(str);
}

const str = "VuZ3q7J4wo35Pi";

if (isAlphanumeric(str)) {
    console.log("The string contains only letters and numbers.");
} else {
    console.log("The string contains characters other than letters and numbers.");
}



   
/*
run:
    
The string contains only letters and numbers.
       
*/

 

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