NXC  Version 1.2.1 r5
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int Pos ( string  Substr,
string  S 

Find substring position.

Returns the index value of the first character in a specified substring that occurs in a given string. Pos searches for Substr within S and returns an integer value that is the index of the first character of Substr within S. Pos is case-sensitive. If Substr is not found, Pos returns negative one.

SubstrA substring to search for in another string.
SA string that might contain the specified substring.
The position of the substring in the specified string or -1 if it is not found.