Trace the functions: what is returned? · Grade 8

The programs to trace

Directions: Trace each program line by line without a computer. Keep a note of every variable as it changes, then write exactly what the program prints or the final value.

• 1 What is printed?
• 1 def f(x):
• 2 return x * 3
• 3 def g(x):
• 4 return x - 4
• 5 print(f(g(6)))
• 2 What is printed?
• 1 def bigger(a, b):
• 2 if a > b:
• 3 return a
• 4 return b
• 5 print(bigger(2, 3) * 3)
• 3 What is printed? Write each line.
• 1 def check(n):
• 2 if n % 2 == 0:
• 3 return "fits"
• 4 return "left over"
• 5 print(check(18))
• 6 print(check(11))
• 4 What is printed?
• 1 def double(n):
• 2 return n * 2
• 3 total = 0
• 4 for i in range(1, 5):
• 5 total += double(i)
• 6 print(total)
• 5 What is printed?
• 1 def boost(x):
• 3 print(boost(4))
• 6 What is printed?
• 1 def area(w, h):
• 2 return w * h
• 3 print(area(5, 3) + area(2, 2))