Numbers

US Currency (USD)

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

Available in

JavaScript / ECMAScript code

jsJavaScript

const re = new RegExp("^\\$?\\d{1,3}(,\\d{3})*(\\.\\d{2})?$", "");
const input = "$1,234.56";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

Python (re) code

pyPython

import re

pattern = re.compile(r"^\$?\d{1,3}(,\d{3})*(\.\d{2})?$")
input_text = "$1,234.56"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

Go (RE2) code

goGo

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.