Numeric values (int and float behavior) in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of mixed int and float arithmetic

What is the output of this Python code?

Python

result = 5 + 3.0 * 2
print(result)

A 16.0

B 11

C 16

D 11.0

💡 Hint

Remember that multiplying an int by a float results in a float.

Due to operator precedence, 3.0 * 2 = 6.0 (float), then 5 + 6.0 = 11.0.

❓ Predict Output

intermediate

Integer division vs float division

What is the output of this code snippet?

Python

a = 7 // 2
b = 7 / 2
print(a, b)

A 3 3.5

B 3.5 3

C 3 3

D 3.5 3.5

💡 Hint

// is floor division, / is true division.

7 // 2 is 3 (integer floor division), 7 / 2 is 3.5 (float division).

❓ Predict Output

advanced

Float precision in arithmetic

What is the output of this code?

Python

x = 0.1 + 0.2
print(x == 0.3)

A True

B TypeError

C False

D SyntaxError

💡 Hint

Floating point numbers can have small precision errors.

0.1 + 0.2 is not exactly 0.3 due to floating point precision, so the comparison is False.

❓ Predict Output

advanced

Type and value after mixed operations

What is the type and value of variable 'result' after running this code?

Python

result = int(4.7) + float(3)

A <class 'float'> and 7

B <class 'int'> and 7.0

C <class 'int'> and 7

D <class 'float'> and 7.0

💡 Hint

int(4.7) converts 4.7 to 4, float(3) converts 3 to 3.0.

int(4.7) is 4 (int), float(3) is 3.0 (float), 4 + 3.0 is 7.0 (float).

🧠 Conceptual

expert

Behavior of float('inf') in arithmetic

Which option correctly describes the output of this code?

Python

import math
x = float('inf')
y = x - 1000
print(y == x)

A False

B True

C Raises OverflowError

D Raises ValueError

💡 Hint

Infinity minus any finite number is still infinity.

float('inf') represents positive infinity; subtracting a finite number does not change it, so y == x is True.