How do i ask for specific input from a user, using a for loop, to reject all wrong input and re - request for input?

Answer 1

For example:
zero=input("Please enter a zero.\n")
while float(zero) != 0:
zero=input("I said a zero.\n")
print(zero)

EDIT:
If you are not using python you can use a do/while loop for better readability.

Answer 2

Thank you very much :-)

Answer 3

No problem :)