Python 4b - Mathematical Operators

Mathematical Operators

When comparing two values, like in an if statement, there are a number of operators than can be used:

In the example below the print line will only be executed if the temperature value is greater than 25:

If we entered 25 exactly then the print line beneath it would not run because technically it is not above 25.

 

We could use the greater than or equal to sign ( >= ) as in this case it would run the print line if you entered 25 because it is greater than or equal to 25:

You can use the less than ( < ) and less than or equal to sign ( <= ) in a similar way (and implement an elif at the same time):

Now there’s only one thing missing from this program – we need an else statement for any value that is inputted between:

Can you work out which sentences would be printed if we entered 8, 10 and 24?

The opposite of equal to (==) is not equal to (!=); for example:

Practice Task

A school is putting on a quiz for sixth form students.

Students enter their age and they will receive a ticket to the quiz if it is between (and including) 16 to 18.

Example solution:

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