Is_Null

Syntax: Is_Null(inputString, length)

Argument: inputString is a string to be checked. length is the size of inputString buffer.

Return Type: Integer. 0 means that inputString is not a NULL string. 1 means that inputString is a NULL string

Description: Indicates if the string is a NULL string.

Example:

if (Is_Null(CRTRAN25.acquirerId,12) = 1) 
then ...;

In this example, the inputString string for the acquirer ID of the receiving accounts is 12 characters in length, which will be checked for NULL value. If inputString string contains 12 NULL values, the Is_Null function will return a value of 1 and the THEN statement will be executed.