Update index.md

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Kristofer Koishigawa
2018-10-15 20:52:19 +09:00
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@ -20,11 +20,14 @@ for i in range(5):
```
#### Example with optional additional arguments
The first argument, *start* includes the number at which to start the progression.
The second argument, *stop* is the same as in the example above, and the progression stops before this number.
The third argument, *step* is for when you want to generate numbers, but at a step greater than one.
The first argument, *start*, is the starting number of the sequence.
The second argument, *stop*, means to generate numbers up to, but not including this number.
The third argument, *step*, is the amount to increment by. In other words, it's the difference between each number in the sequence. It defaults to 1 if step is not specified.
```py
for i in range(3,12,2):
for i in range(3, 12, 2):
print(i)
```