2.4. Summary of Expression Types

Here is a table summarizing the basic arithmetic operations:

Expression	Arithmetic meaning
1 + 2	Addition, the result is 3
3 * 4	Multiplication, the result is 12
4 / 3	Division, the result is 1.333333333333
4 // 3	Integer Division, the result is 1
16 % 3	Modulo (remainder), the result is 1
2 ** 3	Power, 2 to the 3rd power - result is 8
-1	Negation, the result is -1

What is the result of 3 / 4?

• 0
• In some languages, this would be correct. But, this book is using Python 3 so you get a decimal result.
• 1
• No, try again.
• 0.75
• Correct.
• 0.25
• This would be correct if it was 1 / 4, 1.0 / 4, or 1 / 4.0

What is the result of 8 // 5?

• 2
• You will get an integer answer, but that is not it.
• 1
• Correct. // does integer division.
• 1.6
• Remember that // does integer division
• 0.25
• This would be correct if it was 1 / 4, 1.0 / 4, or 1 / 4.0

What is the result of 18 % 5?

• 0
• This would be correct if it was 18 % 2, but what is the remainder of 18 divided by 5?
• 1
• This would be correct if it was 18 % 17, since 17 goes into 18 one time and the remainder is 18 - 17 = 1.
• 2
• What is the highest multiple of 5 that is less than or equal to 18? The remainder is 18 - that number.
• 3
• The reminder is 3 since 5 goes into 18 three times (15) and 18 - 15 = 3.

What is the result of 2 % 6?

• 0
• This would be correct if it was 6 % 2.
• 1
• This would be correct if it was some odd number divided by 2, but it is not.
• 2
• 6 goes into 2 zero times with 2 left over.
• 6
• If you have a smaller number divided by a larger number the remainder is always the smaller number.

You have attempted of activities on this page