Basics

Variables

Integer and Real

Modern Fortran has explicit numeric types. Integer math is exact; real math approximates with floating point.

Program

Play the program to convert an integer to real and halve it.

variables.f90 
program variables
    implicit none
    integer :: count
    real :: half
    count = 5
    half = real(count) / 2.0
    print '(I0, A, F0.1)', count, " ", half
end program variables
type declaration `integer ::` and `real ::` give a variable its type.
type conversion `real(count)` converts an integer to a real.
format spec `F0.1` prints a real with one decimal and minimum width.