Convert string numbers to integers in JavaScript

Can someone explain why the variable catAge is not recognized as a number (despite not being a string?) and instead concatenates to return 52 instead of 7? I am new to programming and would appreciate any assistance!

    var petAge = 5;
    var catAge = prompt("Please enter your cat's age:");

          // Unexpected result
          alert(catAge + 2);

          // Corrected version
          alert(parseInt(catAge) + 2);

Answer №1

const dogAge = 3;
const userCatAge = prompt("Please enter your cat's age:");

alert(parseInt(userCatAge) + 2);

You should utilize the provided code snippet as prompt always returns a String value, leading to concatenation instead of addition.

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