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A251 User's Guide
A251 Introduction
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Appendix
A251 User's Guide
SUBSTR Function
The SUBSTR MPL function returns a substring of the specified text argument. The SUBSTR function takes three arguments: a character string to be divided, and two numeric arguments. The syntax for the SUBSTR function is:
%SUBSTR (balanced-text,expression1,expression2)
Where
| balanced-text | is a text argument possibly containing macro calls. This is the string from which a substring is returned. |
| expression1 | specifies the substring's starting position in balanced-text. If expression1 is zero or is greater than the length of the balanced-text, SUBSTR returns a null string. The index of the first character of balanced-text is 1. |
| expression2 | specifies the number of the characters to expand from balanced-text. If expression2 is zero SUBSTR returns a null string. If expression2 is greater than the remaining length of the string all characters from the expression1th character to the end of the string are included. |
Source Text
%DEFINE (STRING) (abcdefgh) %SUBSTR (%string, 1, 2) %SUBSTR (%(1,2,3,4,5), 3, 20)
Output Text
ab 2,3,4,5
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