String Method
What is a method?
A method is a function that is associated with a class.
This might not make sense, but basically it is a feature we can use to do something with a data type.
For example, we can use the .split method to split a string into pieces.
Here, the .split is a method to split a string data
Lowercase and Uppercase methods
It is very important to know about these methods.
In English and a few other languages, the lowercase and uppercase is a very important difference.
To make sure we can handle these differences, we need to turn one into the other.
Usually, uppercase is turned to a lower case with the lower() method.
print("HELLO".lower())
These kinds of method is usually used to handle inputs.
| Other uper/lower methods | Explanation |
|---|---|
| title() | To a title-format (Make every character in front of a word uppercase) |
| upper() | Transform into an uppercase |
| isupper() | Check if the string is uppercase |
| islower() | Check if the string is lowercase |
len()
The len() method is used for checking how long a string is.
print(len("Hello"))
len is the shortened word for 'length'.
index()
The index() method will help you find where a 'substring' is located.
Substring is a part of a string, and the index is the position of the substring.
print('abcdef'.index('abc')) # prints 0
If there is no substring, it will throw an error.
Operators
Operators are used to perform mathematical operations.
In strings, they are used like a method shortcut.
in
This operator returns a Boolean of whether a substring exists in a string.
print('abc' in 'abcdef') # prints True
+
This operator is used to concatenate two strings.
print('abc' + 'def') # prints abcdef
Concatenate means to combine together.
*
This operator is used to repeat a string.
print('abc' * 3) # prints abcabcabc