Question

How to take user input in fortran? I knpw that we use 'read ' function , but here it is not working.

Answer 1

This should help: https://www.tutorialspoint.com/fortran/fortran_basic_input_output.htm

I've also made a small program that can read someone's name (spaces not allowed) and print it out:

Program Hello
character (len = 20) :: name
print *, 'What is your name?'
read *, name
print *, 'Hello, ', trim(name), '!' !trim() is used to remove any trailing space after the useful part of the name
End Program Hello

If you still have trouble, please share your code.