Before You Begin

Before you can use this tool, you must first set the environment variables by sourcing the environment script using the initialization utility to initialize all the tools in one step.

From a terminal session, run:

By default, the path for <install_dir> is /opt/intel/oneapi

Use the Command Line

Use the command below to invoke the compiler from the command line.

• ifort helloworld.f90

Build a Program

Follow the steps below to test your compiler installation and build a program.

1. Use a text editor to create a file called "hello.f90" with the following contents:

   print *, "hello!"
   end

2. From a command window, issue the following command using a BASH-style shell:

   /usrs/users/me$   . /<install_dir>/setvars.sh

   This command adds the compiler directors to PATH and updates LD_LIBRARY_PATH to make it easier to run a Fortran program.

   The command to invoke the setup script must be done in any command window where you want to use the Intel® Fortran Compiler. Alternatively, the command can be added to a .bashrc or other shell startup file.

3. From the command window, issue the following command:

   /usrs/users/me$    ifort –o hello hello.f90

4. Now you have an executable called "hello", which can be run and will give immediate feedback.

   /usrs/users/me$   hello
   hello!

Next Steps

• Explore the latest oneAPI Fortran Code Samples and Intel® Fortran Compiler Tutorials .

• Explore the Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference on the Intel® Developer Zone.