Testing the installation

To test the product installation and the critical search paths, build and run a sample application.

About this task

Take the following steps to build and run a “Hello World” application:

Create the following Fortran program and name the source file hello.f:
```
      PRINT *, "Hello World!"
      END
```
Note: Each line must have six blank spaces before the first text character.
Compile the program:
If you have set up the short invocation commands, enter the following command:
```
 bgxlf hello.f -o hello
```
If you have not set up the short invocation commands, enter the following command:
```
  installation_path/xlf/bg/14.1/bin/bgxlf hello.f -o hello
```
where installation_path is the installation location of the compiler packages. If the compiler has been installed to the default location, installation_path is /opt/ibmcmp/.
Compile the program:
If short invocation commands have been set up, enter the following command:
```
 bgxlf hello.f -o hello
```
If short invocation commands have not been set up, enter the following command:
```
 /opt/ibmcmp/xlf/bg/14.1/bin/bgxlf hello.f -o hello
```
Run the program by entering the following command:
```
  ./hello
```
The result is "Hello World!".
Check the exit code of the program by entering the following command:
```
  echo $?
```
The result is "0".