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# Python String | replace method

schedule Aug 11, 2023
Last updated
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Python
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Python's `str.replace(~)` method returns a new copy of the string with all occurrences of the `old` substring replaced by the `new` substring.

# Parameters

1. `old` | `string`

The substring to be replaced by `new`.

2. `new` | `string`

The substring to replace `old` substring with.

3. `count` | `number` | `optional`

The number of occurrences of the `old` substring to replace. Defaults to all occurrences.

# Return value

Returns a new copy of the string with all occurrences of the `old` substring replaced by the `new` substring.

If `count` argument is provided, only the first `count` occurrences will be replaced.

# Examples

## Basic usage

To replace all occurrences of `"Hi"` with `"Hello"`:

``` x = "Hi Hi Hi!"x.replace('Hi', 'Hello') 'Hello Hello Hello!' ```

We can see that all occurrences of `'Hi'` are replaced by `'Hello'` in the returned string.

## Count parameter

To replace only the first two occurrences of `'Hi'`:

``` y = "Hi Hi Hi!"y.replace('Hi', 'Hello', 2) 'Hello Hello Hi!' ```

We can see that only the first two occurrences of `'Hi'` are replaced by `'Hello'` in the returned string.

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