US Currency (USD) in GO

Matches USD currency amounts with optional $ sign, thousands separators, and cents.

Pattern

^\$?\d{1,3}(,\d{3})*(\.\d{2})?$

Go (RE2) code

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^\$?\d{1,3}(,\d{3})*(\.\d{2})?$`)
	input := `$1,234.56`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

How the pattern works

Examples

Same pattern, other engines