strextract/4—retrieve a string of a specified length that begins at a specified position within a larger string
The strextract/4 function retrieves a string of a specified length that begins at a specified position within a larger string. The general syntax for this function is as follows:
strextract($STR,$POS,$LEN,$NEWSTR)
$NEWSTR=strextract($STR,$POS,$LEN)strextract/4 arguments
Argument | Mode | Type | Description |
|---|---|---|---|
| Input | STRING | Specifies the base string within which you want to retrieve another, partial, string that starts at |
| Input | INTEGER | Specifies the starting position for the partial string that you want to return |
| Input | INTEGER | Specifies the length (number of characters) of the partial string that you want to return |
| Output | STRING | Retrieved string |
Use the strextract/4 function to return part of the string specified in the $STR argument into $NEWSTR. The returned part of the string starts at character position $POS and is $LEN characters long.
The $POS is determined by counting 1 as the first character of the string specified in $STR.
strextract/4 example
strextract($YYYYMMDD,5,2,$MM);
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