When you're working with a Python program, you might need to search for and locate a specific string inside another string. This is where Python's built-in string methods come in handy. In this article, you will learn how to use Python's built-in Here is what we will cover: The It takes a substring as input and finds its index - that is, the position of the substring inside the string you call the method on. The general syntax for the Let's break it down: The return value of the If the substring is present in the string, If the substring you are
searching for is not present in the string, then How to Use find() with No Start and End Parameters ExampleThe following examples illustrate how to use the You can take a single word and search to find the index number of a specific letter:
I created a variable named I called the I stored the result of the operation in a variable named The return value was the index of Keep in mind that indexing in programming and Computer
Science in general always starts at How to Use find() with Start and End Parameters ExampleUsing the start and end parameters with the For example, if you wanted to find the index of the letter 'w' and start the search from position
Since the search starts at position 3, the return value will be the first instance of the string containing 'w' from that position and onwards. You can also narrow down the search even more and be more specific with your search with the end parameter:
Substring Not Found ExampleAs mentioned earlier, if the substring you specify with
Is the find() Method Case-Sensitive?What happens if you search for a letter in a different case?
In an earlier example, I searched for the index of the letter In this case, searching for the letter So, when searching for a substring with the The find() Method vs the in Keyword – What's the Difference?Use the The general syntax for the
The
The And if the substring is not present, it returns
Using the You first check to see if a string contains a substring, and then you can use So, use The find() Method vs the index() Method – What's the Difference?Similar to the So, both methods work in the same way. The difference between the two methods is that the
The example above shows that You may want to use ConclusionAnd there you have it! You now know how to search for a substring in a string using the I hope you found this tutorial helpful. To learn more about the Python programming language, check out freeCodeCamp's Python certification. You'll start from the basics and learn in an interactive and beginner-friendly way. You'll also build five projects at the end to put into practice and help reinforce your understanding of the concepts you learned. Thank you for reading, and happy coding! Happy coding! Learn to code for free. freeCodeCamp's open source curriculum has helped more than 40,000 people get jobs as developers. Get started Which of the following function gives the first occurrence of substring in a string?The strpos() function finds the position of the first occurrence of a string inside another string.
How do you find the position of the first occurrence of a substring in a string?The indexOf() method returns the position of the first occurrence of specified character(s) in a string.
Which function is used to find the substring of string?Returns a specified substring from a string.
Which function is used to locate the first occurrence of character in any string?The strchr() function finds the first occurrence of a character in a string. The character c can be the null character (\0); the ending null character of string is included in the search. The strchr() function operates on null-ended strings.
|