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Index(String, Substring)
Index: INTEGER(KIND=1) function.
String: CHARACTER; scalar; INTENT(IN).
Substring: CHARACTER; scalar; INTENT(IN).
Intrinsic groups: (standard FORTRAN 77).
Description:
Returns the position of the start of the first occurrence of string Substring as a substring in String, counting from one. If Substring doesn't occur in String, zero is returned.