Currency

The following regular expressions can be used for matching numbers that represent US currency:

Expression:

^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$

Description:
Matches a currency amount (cents mandatory).
Optional thousands separators. Mandatory two-digit fraction.

Test Matches:

1234
1 2 3 4
+1234
-1234
12.
.34
1,234.56
123.45
+123.45
-123.45

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Expression:

^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$

Description:
Matches a currency amount (cents optional).
Optional thousands separators. Optional two-digit fraction.

Test Matches:

1234
1 2 3 4
+1234
-1234
12.
.34
1,234.56
123.45
+123.45
-123.45