fortran - Evaluating a specific letter of a string defined in a derived type in Fortran90

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65877002/problems-with-getting-substrings-from-strings-in-fortran

Answer 1

In Fortran, a character substring reference always needs a start and end position. So what you want here is myline%list(3:3).

You can omit the end position (retaining the colon), for example (3:), and that means the rest of the string. Similarly you can omit the start position and it means from the first character (:3).

As a suggestion, letter would be better declared with the parameter attribute as it is a constant, but what you have would work.