Hello! This is me (Shyam Babu) and I'm here with my program called "PermutationsCalc"
First, download the zip folder and place it in a folder where the program will be easily accessible for you and unzip it
Next,
Open your terminal and set your directory to that folder. For Example cd <Your Location>
And type ./permnum when you are ready!!
Copy-paste or download the program and run it!