Range Quantifiers in Regular Expressions

1. Exact Quantifier: {n}

The exact quantifier {n} specifies that the preceding element must appear exactly n times. This quantifier is useful when you need to match a specific number of occurrences of a character or group.

Example:

Pattern: a{3}

Matches: "aaa"

Explanation: The pattern a{3} matches exactly three 'a' characters.

2. Minimum Quantifier: {n,}

The minimum quantifier {n,} specifies that the preceding element must appear at least n times. This quantifier is useful when you need to match a minimum number of occurrences of a character or group.

Example:

Pattern: a{2,}

Matches: "aa", "aaa", "aaaa", etc.

Explanation: The pattern a{2,} matches two or more 'a' characters.

3. Range Quantifier: {n,m}

The range quantifier {n,m} specifies that the preceding element must appear at least n times and at most m times. This quantifier is useful when you need to match a range of occurrences of a character or group.

Example:

Pattern: a{2,4}

Matches: "aa", "aaa", "aaaa"

Explanation: The pattern a{2,4} matches between two and four 'a' characters.