← Python

Imports

import loads a module so its functions and variables can be used in your script

What it does: Beyond the four basic operators, Python has three more. // (floor division) divides and rounds down to the nearest whole number, so 10 // 3 gives 3, not 3.33. % (modulo) returns the remainder left over after division — 10 % 3 is 1, because 3 goes into 10 three times with 1 left over. ** (exponent) raises the left number to the power of the right, so 2 ** 4 is 16. A common practical use of % is checking whether a number is even: number % 2 == 0.

Common mistakes: Writing // with a space in between (a / / b) is a syntax error — it has to be two characters with no gap. Confusing % with "percentage" is another: it always returns a whole-number remainder, not a percent.

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Learning

Duo

What does // do?

Integer division (no decimal)Regular division

Matches

❌ result = 10 % 0

↓

Error: Modulo by zero

Applying

Meanings

Term

Meaning

Floor division - divides and rounds DOWN to the nearest integer.

Practice

print(10 // 3)

Testing

Gaps

print(10 3) # Result: 3

Check Answer

Spots

2b = 3

3result = a / / b

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Quick Questions

1. What does // do?

A. Integer division (no decimal) ✓

B. Regular division

// is floor division — it drops the decimal part from the result

2. What does % do?

A. Calculates percentage

B. Returns the remainder ✓

% is the modulo operator — it returns what's left over after division

3. What does ** do?

A. Raises to a power (exponent) ✓

B. Multiplies twice

** is the exponent operator — 2**3 means 2 × 2 × 2 = 8

4. What is 10 // 3?

A. 3.33

B. 3 ✓

10 ÷ 3 = 3.33 — floor division drops the decimal to give 3

5. What is 10 % 3?

A. 1 ✓

B. 3

3 goes into 10 three times (9), with 1 left over

Match the Pairs

result = 10 % 0 → Error: Modulo by zero

2 ^ 3 → Error: Use ** not ^ for powers

10 % 2 == 0 → Valid: Check if even

2 ** 10 → Ok: 2 to the power 10

print(17 // 5) → Output: 3

print(17 % 5) → Output: 2

Key Term

//

Floor division - divides and rounds DOWN to the nearest integer.~~%

Fill in the Blanks

1. print(10 // 3) # Result: 3

2. print(10 % 3) # Result: 1

3. print(2 ** 3) # Result: 8

4. print(7 % 2) # Result: 1 (remainder)

5. print(5 ** 2) # Result: 25

Spot the Error

Question 1

A a = 10

B b = 3

C result = a / / b

D print('Floor division:', result)

Line C — No space between the slashes: use // not / /

Question 2

A base = 2

B exp = 3

C result = base ^ exp

D print('Power:', result)

Line C — Python uses ** for power, not ^ (^ is a different operator)

Question 3

A a = 10

B b = 3

C result = a % % b

D print('Remainder:', result)

Line C — Only one % sign for modulo: not %%

Question 4

A base = 10

B exp = 3

C result = base * * exp

D print('Power:', result)

Line C — No space between the asterisks: use ** not * *

Question 5

A result = 10 mod 3

B a = 10

C b = 3

D print('Remainder:', result)

Line A — Python uses % for modulo, not the word 'mod'

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