ifort: command not found

I completed installing the parallel studio xe 2016.1.056 for linux on my centos 7.

For using ifort command, I implemented the following commands,

#./opt/intel/bin/ifortvars.sh intel64

#./opt/intel/bin/compilervars.sh intel64.

But still I get "ifort: command not found" when I use ifort command.

What is the problem? Please help me...