Floating Point Numbers

The following regular expressions can be used for matching floating point numbers:

Expression:

[-+]?\b[0-9]+(\.[0-9]+)?\b

Description:
Matches an integer or a floating point number with mandatory integer part. The sign is optional.

Test Matches:

123456
1 2 3 4 5 6
+123456
-123456
123.
.456
1,234.56
123.456
+123.456
-123.456

---

Expression:

[-+]?\b[0-9]*\.?[0-9]+\b

Description:
Matches an integer or a floating point number with optional integer part. The sign is optional.

Test Matches:

123456
1 2 3 4 5 6
+123456
-123456
123.
.456
1,234.56
123.456
+123.456
-123.456