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Handling Errors (Try-Catch) — JavaScript typing lesson

Learn try/catch to handle errors gracefully.

What you'll practice

What if a user types text when we expect a number? Our program could crash! Let's learn to handle errors with `try` and `catch`.

JavaScript will `try` to run the code inside the `try` block.
If an error happens in the `try` block, the code in the `catch` block will run instead.

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📜JavaScript

Handling Errors (Try-Catch)

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let number_as_text = prompt('give me a number');↵
↵
try {↵
    let number = parseInt(number_as_text);↵
    console.log('your number doubled is ' + (number * 2));↵
} catch (error) {↵
    console.log('whoops that was not a number');↵
}

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let number_as_text = prompt('give me a number');

try {
    let number = parseInt(number_as_text);
    console.log('your number doubled is ' + (number * 2));
} catch (error) {
    console.log('whoops that was not a number');
}

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