# Lesson 15: Functions — Reusable Blocks
# WHAT TO DO: A function is a named block of code. def defines it, and
# calling its name runs it. double() should return twice its number,
# but one line is wrong. Fix line 10: change number + 1 to number * 2.
# HINT: return hands the answer back to the program (it does not print
# it). double(7) should give 14, so the program should print 14.
# Run with F5 in IDLE. You are done when the last line prints 14.

def double(number):
    return number + 1  # <-- CHANGE THIS LINE: return twice the number


result = double(7)
print(result)