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In this chapter, as we look at operators in Python, we are going to be using the

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Python Shell which is called Idle in a graphical environment, or in a text

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environment, it's simply the Python Interpreter, run from the command line.

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Python has all of the standard arithmetic operators. For example, if you say 5 + 5, you get 10.

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If say 5 * 5, you get 25.

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If you say 5 - 3, you get 2, and if you say 5 / 3, you get this 1.666.

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Python also has some thing that they call floor division, which is simply integer division.

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If I say 5 with two slashes divide by three then I get 1, which, of course, has

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a remainder as well.

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So if I say 5 with a percent sign from modulo and a 3, then I get the remainder.

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Python also has a built-in function called divmod that gives the two results together.

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So if we say Divmod(5, 3), then you get both of those results together as a tuple.

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Finally, Python has increment and decrement operators, and they are not quite the

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same as you see in some other scripting languages.

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If I say num = 5 and I say num += 1, then look at the value of num; we get 6.

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If I Say, num -= 1 and we look at the value of num, then we get 5.

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There is also a multiplication and division form of these.

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So If I say num *= 5, I get 25.

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If I say num floor division equals 5, then I get the integer 5.

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Of course if I say num *= 5 again and then num with one slash /=5, then we get the

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floating point version 5.0.

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So those were the basic arithmetic operators that are available in Python.

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It has all the standard ones, and a couple that it's implemented in its

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own interesting way.