The **`swapcase` method** converts the uppercase characters of a string to lowercase and vice-versa. 

# Syntax

```py
str.swapcase()
```
# Return value

`swapcase` returns a copy of the string with the cases swapped.

# Example

# convert all lowercase characters to upper case & uppercase characters to lower case and return a new string
string = "all lower"
print(string.swapcase()); 

string = "UPPER"
print(string.swapcase());

string = "This IS a Mixed 10"
print(string.swapcase());

In the code above, we call the `swapcase` method on different strings.




## Important things to note
There is no guarantee that the following will apply.

```python
string.swapcase().swapcase() === string
```

The criteria above may not be met for non-English characters. For example, let's take the German word `Straße`, meaning road. The 
 German letter `ß`  is equivalent to the English letter combination `ss`. So, when `swapcase` is called,  `Straße` is converted to `sTRASSE`. When we call `swapcase` on `sTRASSE`, we will get `Strasse` and not `Straße`. 

string = "Straße";

print("The string is ", string)

swapped_str = string.swapcase();
print("The swapped string is ", swapped_str)

print("\nCalling swapcase on already case swapped string")
again_swapped_str = swapped_str.swapcase()
print(again_swapped_str)

print("\nChecking Straße.swapcase().swapcase()=== Straße")
print(again_swapped_str == string)

What is string.swapcase in Python?

Syntax

Return value

Example

Code

Important things to note