80 lines
1.3 KiB
Markdown
80 lines
1.3 KiB
Markdown
# Flow Control for-loop
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{:.no_toc}
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<nav markdown="1" class="toc-class">
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* TOC
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{:toc}
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</nav>
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## The goal
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For what reason...
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Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
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**Logic blocks need to be indented. Preferable with 4 spaces!**
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## [The for statement](https://docs.python.org/3/reference/compound_stmts.html#the-for-statement)
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> The for statement is used to iterate over the elements of a sequence (such as a string, tuple or list) or other iterable object
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### With range()
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```python
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for i in range(0, 3):
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print(i)
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```
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Output:
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```python
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0
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1
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2
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```
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### [range()](https://docs.python.org/3/library/stdtypes.html#ranges)
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```python
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class range(stop)
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class range(start, stop[, step])
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```
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### With a list
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```python
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for i in [0, "A", 7, "nom num"]:
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print(i)
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```
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Output:
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```python
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0
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A
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7
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nom num
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```
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## The full statement
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```python
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for_stmt ::= "for" target_list "in" starred_list ":" suite
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["else" ":" suite]
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```
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## for loop (enumerate)
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XXXXXXXXX
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## for loop (the truth)
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{: .topic-optional}
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This is an optional topic!
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The for loop is not counting up itself. It uses the \_\_iter\_\_ & \_\_next\_\_ combo of a instance of a class or a generator via [yield](https://docs.python.org/3/reference/simple_stmts.html#the-yield-statement).
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XXXXXXXXX
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