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Strings are one of the most used python data structures. While programming in python, some strings are used in uppercase while some are in lowercase and some in combination. Hence, it is chaotic to pay attention to every string you create and use while programming, and also quite difficult to correct it manually.

As it is important and default format to capitalize the first letter of every word for readers convenience, we have presented a detailed article representing 8 different methods to capitalize the first letter in python and the examples. But, before learning those methods, let us have a brief introduction to strings in python.

Python string is the collection of the characters surrounded by single quotes, double quotes, or triple quotes. The computer does not understand the characters; internally, it stores manipulated characters as the combination of the 0's and 1's. This means that strings can be parsed into individual characters and that individual characters can be manipulated in various ways.

This is what makes Python so versatile: you can do almost anything with it, and some things even work the way they do in another language. To learn more about strings in python, refer to our article "4 Ways to Convert List to String in Python".

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Below are the eight methods to capitalize the first letter of strings in python:

The string.capitalize () function takes the string argument and returns the first letter of the capitalized word. This can be useful if you have a lot of text that you want to format as uppercase automatically or if you want to change the file's name or folder. The function works on any string containing English letters, numbers, and punctuation marks.

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We used the slicing technique to extract the string’s first letter in this method. We then used the upper() method of string manipulation to convert it into uppercase. This allows you to access the first letter of every word in the string, including the spaces between words. The below example shows the working of this method in detail.

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string.title() method is a very simple and straightforward method of generating titles for strings. As the titles for string have a default structure where the first letter is always in upper case, this method helps us capitalize the first letter of every word and change the others to lowercase, thus giving the desired output. This method is also useful for formatting strings in HTML and formatting strings in JavaScript and other programming languages.

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When we use the entire sentence as the input string, it will capitalize the first letter of every word in the string, as shown below.

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The behaviors drawn from the above example are:

Here, we make use of the split() method to split the given string into words. The generator expression iterates through the words, using the capitalize() method to convert the first letter of each word into uppercase. The capitalize() method converts each word’s first letter to uppercase, giving the desired output. The below example shows the working of the capitalize function in detail.

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capwords() is a python function that converts the first letter of every word into uppercase and every other letter into lowercase. The function takes the string as the parameter value and then returns the string with the first letter capital as the desired output. Check out the below example to understand the working of the capwords() function.

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Regex is generally known as a regular expression in python, is a special sequence of characters that helps match or find the other strings. Using regex, you can search the starting character of each word and capitalize it. For using this method, you have to import the regex library using the “import” keyword before defining the main function, as shown in the below example. Also, remember that this method only capitalizes the first character of each word in python and does not modify the whitespaces between the words.

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You must wonder how difficult it would be if we had an entire list of words as a string instead of a single string to capitalize the first letter in python. Well, it is quite simple. When you have an entire list of words and wish to capitalize the first letter of every word, you can iterate through the words in the list using for loop and then use the title() method in python. This process will help you to convert the first letter of each word in the list to uppercase.

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Capitalizing the first letter of any given the word manually is quite feasible, but what if you have to capitalize the first letter of every word in any given file? Well, it is quite easy too. For this situation, you have to use the open() method to open the file in the reading mode and then iterate through every word using for loop. Later, you can capitalize the first letter of every word using the title() function, just like shown in the below example.

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