Problem Session 1 Solutions

1. [PP Problem 2.1] Indicate whether the result is an int or float by (not) including a decimal point, e.g. 5 for an int, 5.0 for a float.

   For each of the following expressions, what value will the expression give?

   a. 6
   b. 20.0
   c. 4.5
   d. -4.5
   e. -5
   f. 1
   g. 1.0
   h. 1.0
   k. -4.5
   l. 19
   m. 35

2. Write a function named average that has two numbers as parameters and returns the average of those values.

    def average(a, b):
        """
        Return the average of a and b
        """
        return (a + b) / 2
   

3. Given variables x and y, which are assigned the values 3 and 12.5, respectively, what will the following expression print?

   a. The rabbit is 3.
   b. The rabbit is 3 years old.
   c. 12.5 is average.
   d. 12.5 * 3
   e. This will generate a Type Error as you can’t perform + on strings and numbers. The operands either need to both be numeric types or both be strings.