OS/2 Procedures Language 2/REXX


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SUBSTR( )


The value of any REXX variable can be a string of characters.  To select a 
part of a string, you can use the SUBSTR( ) function.  SUBSTR is an 
abbreviation for substring. The first three arguments are: 
   o  The string from which a part is taken. 
   o  The position of the first character that is to be contained in the 
      result (characters are numbered 1,2,3...in the string). 
   o  The length of the result. 
 For example: 

 S = 'reveal'
 SAY substr(S,2,3) /* Says 'eve'. Beginning with the second  */
                   /*  character, takes three characters.    */
 SAY substr(S,3,4) /* Says 'veal'. Beginning with the third  */
                   /*  character, takes four characters.     */
 
   

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