JS Built-ins
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RegExpexecintermediate

RegExp exec() — full match

📖 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 an array where index 0 is the full match.

Challenge: Verify that /(\d+)/.exec('abc123')[0] equals '123'.

💡 Hints (1)
  • • exec() returns null if no match, or an array where [0] is the full match