function

functions are bits of code which tell you the name of  the code  you are making so the name is normally defined so it could be def times_tables
the argument is like a veritable which is put in brackets like (num)
code is what makes the program run

in the example above I have used two arguments  this code will work out any times tables I put in  and it will run in decimals
the  how far is asking to what number you would like the table to go to the num is asking  what times table you would like