The following exercises provide additional practice problems (not to turn in) for our material this week. Try to solve each problem on paper / whiteboard first before using Thonny to confirm your answers. You are encouraged to work on these practice exercises with classmates throughout the week.
[PP Problem 2.1] Evaluate each expression, indicating whether the result is an int or float by including or 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. 9 - 3
b. 8 * 2.5
c. 9 / 2
d. 9 / -2
e. 9 // 2
f. 9 % 2
g. 9.0 % 2
h. 9 % 2.0
k. 9 // -2.0
l. 4 + 3 * 5
m. (4 + 3) * 5
[PP Problem 4.5] Given variables x and y, which are assigned the values
3 and 12.5, respectively, use the print function to print the following
messages. When numbers appear in the messages, variables x and y should be
used instead.
a. The rabbit is 3.
b. The rabbit is 3 years old.
c. 12.5 is average.
d. 12.5 * 3
e. 12.5 * 3 is 37.5.
The program below is supposed to calculate the length of the hypotenuse of a right triangle with sides 3 and 4 and print out the answer. However, the program has three errors in it: one syntax error, one logic error and one runtime error relating to type. What are the three errors? Try to figure it out without running the program. Think Python describes these three different types of errors (note they call “logic errors” “semantic errors”).
# Take the sqrt of a number
def my_sqrt(x):
return x ** (1//2)
# Calculate the length of the hypotenuse of a right triangle
def hypotenuse_length(a, b)
sum = a**2 + b**2
return my_sqrt(sum)
print("If a is 3 and b is 4 then hypotenuse is " + hypotenuse_length(3,4))
Write a function named x_intercept that has two parameters, the slope and
intercept of a line, and returns the x intercept (i.e. the value of x where
y=0).