JS Built-ins
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RegExpexecbeginner

RegExp exec() — no match returns null

📖 Usage Example
const re = /(\d+)/
const match = re.exec('Price: 42')
console.log(match[0]) // → '42'
console.log(match[1]) // → '42'

Use RegExp.exec() to search for a match and return detailed match information.

RegExp.prototype.exec()

exec() returns null when there is no match.

Challenge: Verify that /\d+/.exec('abc') returns null.

💡 Hints (1)
  • • exec() returns null (not false or undefined) when there is no match