abs() and round() in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of abs() with negative float

What is the output of this Python code?

Python

value = -7.25
result = abs(value)
print(result)

A SyntaxError

B 7.25

C 7

D -7.25

💡 Hint

abs() returns the positive distance from zero.

The abs() function returns the absolute value, which means it removes the negative sign and returns 7.25.

❓ Predict Output

intermediate

Output of round() with one decimal place

What is the output of this Python code?

Python

num = 3.14159
rounded = round(num, 2)
print(rounded)

A 3.15

B 3

C 3.14

D 3.1

💡 Hint

round() rounds to the nearest value at the specified decimal place.

round(3.14159, 2) rounds to two decimal places, resulting in 3.14.

❓ Predict Output

advanced

Output of combined abs() and round()

What is the output of this Python code?

Python

value = -2.675
result = round(abs(value), 2)
print(result)

A 2.67

B 2.7

C 2.6

D 2.68

💡 Hint

abs() removes the negative sign, then round() rounds the number.

abs(-2.675) is 2.675. round(2.675, 2) results in 2.68 due to floating point rounding rules in Python.

❓ Predict Output

advanced

Output of round() with negative digits

What is the output of this Python code?

Python

num = 1234.5678
result = round(num, -2)
print(result)

A 1200.0

B 1300.0

C 1234.0

D 1235.0

💡 Hint

Negative digits in round() round to tens, hundreds, etc.

round(1234.5678, -2) rounds to the nearest hundred, which is 1200.0 because 34.5678 < 50.

🧠 Conceptual

expert

Behavior of abs() and round() with complex numbers

What happens when you run this Python code?

Python

z = complex(-3, 4)
result = round(abs(z))
print(result)

A 5

B TypeError

C 7

D SyntaxError

💡 Hint

abs() returns the magnitude of a complex number.

abs(complex(-3,4)) calculates the magnitude sqrt((-3)^2 + 4^2) = 5. round(5) is 5.