Trace the functions: what is returned? · Grade 9

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 frame(word, edge):
• 2 return edge + word + edge
• 3 print(frame("pixel", "#"))
• 2 What is printed? Write each line.
• 1 def check(n):
• 2 if n % 3 == 0:
• 3 return "fits"
• 4 return "left over"
• 5 print(check(24))
• 6 print(check(19))
• 3 What is printed?
• 1 def f(x):
• 2 return x * 3
• 3 def g(x):
• 4 return x - 3
• 5 print(g(f(7)))
• 4 What is printed?
• 1 def double(n):
• 2 return n * 2
• 3 total = 0
• 4 for i in range(1, 4):
• 5 total += double(i)
• 6 print(total)
• 5 What is printed?
• 1 def perimeter(w, h):
• 2 return 2 * (w + h)
• 3 print(perimeter(3, 6) + perimeter(4, 5))
• 6 What is printed?
• 1 def bigger(a, b):
• 2 if a > b:
• 3 return a
• 4 return b
• 5 print(bigger(8, 10) * 2)