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**NUMERIC(**//string//**)**

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| **NUMERIC** | Validates all numeric string. |
| //string// | A string constant, variable, or expression. |

The **NUMERIC** procedure returns the value 1 (true) if the //string// only contains a valid numeric value. It returns zero (false) if the //string// contains any non-numeric characters. Valid numeric characters are the digits 0 through 9, the letter "E" (see below), a leading minus sign, and a decimal point. DEFORMAT is used to return unformatted numbers from a formatted string.

A valid number may also be a REAL and hence the format of strings representing correct numerics can be one of the following:

**[<;sign>]<;number>[.[<;number>]][e[<;sign>]<;number>]**

**[<;sign>].<;number>[e[<;sign>]<;number>]**

where:

//<;sign>// - either minus (-) or plus (+) character

//<;number>// - definitive (non-empty) sequence of decimal digits

//e// - either "e" or "E" character

| **Return Data Type:** | UNSIGNED |

**Example:**

** !NUMERIC('1234.56')   returns 1**

** !NUMERIC('1,234.56')  returns 0**

** !NUMERIC('-1234.56')  returns 1**

** !NUMERIC('1234.56-')  returns 0**

**IF NOT NUMERIC(PartNumber)     !If part number is not numeric**

** DO ChkValidPart               !check for valid part number**

**END                            !End if**

**See Also:**

[[deformat  return unformatted numbers from string .htm|DEFORMAT]]