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# Using the range function to iterate from 0 to 4
for i in range(5):
    print(f"Iteration {i}")

# How to Create a Range of Numbers in Python

The `range()` function in Python is used to generate a **sequence of numbers**.

It is primarily used with a `for` loop to repeat a block of code a specified number of times or generate a sequence of consecutive numbers.

<br />

## How do you use the range function?

The `range()` function can be used in three different ways as shown below.

<br />

### Single Argument

`range(n)` creates a sequence of numbers from `0` to `n-1`.

For example, `range(5)` generates numbers from `0` to `4` (0, 1, 2, 3, 4).

```python title="Outputs numbers from 0 to 4"
for i in range(5):
    print(i)
```

### Two Arguments

 `range(start, stop)` generates numbers from `start` to `stop-1`.

For example, `range(1, 5)` generates numbers from `1` to `4` (1, 2, 3, 4).

```python title="Outputs numbers from 1 to 4"
for i in range(1, 5):
    print(i)
```

### Three Arguments

`range(start, stop, step)` generates numbers from `start` to `stop-1` with a step interval.

For example, `range(1, 10, 2)` generates numbers from `1` to `9`, increasing by `2` each time (1, 3, 5, 7, 9).

```python title="Outputs numbers from 1 to 9, increasing by 2"
for i in range(1, 10, 2):
    print(i)
```

<br />

As shown, the range function is useful in a for loop to **repeat a block of code a specific number of times** or generate a **sequence of numbers**.

```python title="Example of specifying repetition count"
for i in range(100):
    ... # Repeat code block 100 times
```

The `range()` function, when given two arguments, generates a sequence of numbers from the start value up to, but not including, the end value. For example, range(1, 5) generates the numbers from 1 to 4.

### When the `range()` function takes 2 arguments, the second value is not included in the number generation range.

How to Create a Range of Numbers in Python

How do you use the range function?

Single Argument

Two Arguments

Three Arguments

When the range() function takes 2 arguments, the second value is not included in the number generation range.

When the `range()` function takes 2 arguments, the second value is not included in the number generation range.