Python 3b - Simple Calculations
Simple Calculations in Python
You can perform calculations on numbers in Python using the four main operators:
For addition, use the plus sign +
To subtract numbers, use the dash symbol – (Not an underscore _ )
For multiplication, use an asterisk * which can be made by pressing Shift and 8 on a typical keyboard.
To divide numbers, use a forward slash / (Not a backslash \ )
Type a calculation directly into a print statement to output the result.
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Practice Task 1
1. Print four different simple calculations, using a different operator ( + - * / ) for each.
^ Example solution above
Using Variables in Calculations
You can also perform calculations on variables. The example below has the values of the variables pre-written.
You need to store the result in a variable. The total variable has been used to store the result of the multiplication.
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The example below has one of the variable values inputted by a user.
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Don't leave the user in the dark, better user interfaces are clear and explain what outputted values mean:
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Practice Task 2
1. Ask the user to input a number.
2. Divide the number by 3.
3. print the total. Don't just print the number, include "Total:"
4. Convert the total into an integer (See 3a) so it is printed as a whole number.
Example solution:
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