how comes we don't have to define "x". eg def print_tripple (x) print (3*x) print_tripple("5")

Answer 1

you dont have to define 'x' because 'x' is not a variable. its an argment.
x gets called where you have "print_tripple("5")

also, you missed a " : " at the end of your function.
hope this helps

Answer 2

def print_tripple (x):
print ("3*x")

Answer 3

answer in script is
3*5
15

Answer 4

Hassan gh.lominol that answer is wrong due to you having it in quotations. It will print 3*5. Not 15 because you made it a string.