Imagine that we wish to print numbers from 1 to 100. Naturally, we could do this manually:

```python
print(1, 2, 3, 4, 5, 6, ... 100)
```

But that would be incredibly time-consuming!

If we had to print numbers from 1 to 1,000,000, we'd be counting manually for the rest of our lives!

To tackle this challenge, we'll employ the `for` loop in conjunction with the `range()` function!

# Printing all numbers from 0 to 100
for i in range(101):
  print(i)

The ``range()`` function provides a sequence of numbers that starts at 0 (by default) when the initial limit is unspecified. It increments by 1 (by default) until it reaches a final limit (the final limit itself is not included).

The format of the ``range()`` function is: ``range(start, end, step)``.

If our intention is to operate with decreasing numbers, we can achieve this by inputting a negative **step** argument into the ``range()`` function.

# Increasing
# Printing numbers from 0 to 10
for i in range(0, 11, 1):
  print(i)

# Decreasing
# Printing numbers from 10 to 0
for i in range(10, -1, -1):
  print(i)

We start learning Python loops with the for loop. A for loop is used for iterating over a sequence. Let's go!

With the while loop, we can execute a set of statements as long as a condition is true. We are going to work with this loop and handle different problems!

A nested loop is a loop inside a loop. Sound difficult? Don't worry! We will handle this loop!

Python Loops Tutorial

Range() in a for Loop 1/2

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