Boston Python Workshop 7/Friday/Tutorial: Difference between revisions
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Functions don't have to return anything, if you don't want them to. They usually return something because we usually want to be able to assign variables to their output. |
Functions don't have to return anything, if you don't want them to. They usually return something because we usually want to be able to assign variables to their output. |
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====What is the difference between <code>print</code> and <code>return</code>?==== |
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Think for a moment about the differences between <code>print</code> and <code>return</code>: |
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* <code>print</code> prints output to the screen so your eyes can see it. |
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* <code>return</code> is used to hand off a value from inside a function to a variable outside the function. |
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For example: |
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<pre> |
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def add(x, y): |
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print x + y |
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</pre> |
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will print <code>x + y</code> to the screen so your eyes can see it. |
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<pre> |
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def add(x, y): |
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return x + y |
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</pre> |
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will hand off <code>x + y</code> from inside the function to outside the function. This allows you to do something like: |
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<pre> |
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result = add(5, 6) |
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print result |
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</pre> |
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Does that make sense? If not, talk about it with a neighbor or staff member. |
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==End of Part 2== |
==End of Part 2== |
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