python - How can I check if a string contains ANY letters from …
Jan 31, 2012 · You can use islower() on your string to see if it contains some lowercase letters (amongst other characters). or it with isupper() to also check if contains some uppercase …
How would I check a string for a certain letter in Python?
Aug 25, 2024 · Use the in keyword without is. if "x" in dog: print "Yes!" If you'd like to check for the non-existence of a character, use not in: if "x" not in dog: print "No!"
Python - Check if substring present in string - GeeksforGeeks
Jan 5, 2025 · find () method searches for a substring in a string and returns its starting index if found, or -1 if not found. It’s useful for checking the presence of a specific word or phrase in a …
How to check a string for specific characters? - Stack Overflow
checking type of characters present in a string : isalnum (): Returns True if all characters are alphanumeric ( a to z , A to Z ,0 to9 ) isalpha (): Returns True if all characters are only …
How to check if specified Character is in String? - Python Examples
Discover how to check if a specified character exists in a string in Python using the 'in' keyword. This tutorial includes examples, sample code, and user input methods for verifying character …
Program to Search a Character in a String - GeeksforGeeks
Mar 25, 2025 · Given a character ch and a string s, the task is to find the index of the first occurrence of the character in the string. If the character is not present in the string, return -1.
How do I check if a string contains ALL letters of the alphabet in ...
Apr 5, 2016 · This is my solution in python: alphabet = "abcdefghijklmnopqrstuvwxyz" sentence = input() sentence = sentence.lower() missing = '' for letter in alphabet: if letter not in sentence: …
Discover How to Find a Character in a String Using Python
May 1, 2023 · This article explains several ways through which one can determine the presence of a character in a string in Python. You can opt for the in operator, any keyword, find (), index …
5 Efficient Techniques to Check if a String Contains a Letter in Python
Feb 14, 2024 · The “in” operator in Python is a straightforward and idiomatic way to check for the presence of a substring within a string. This method is highly readable and has the advantage …
How can I check if a single character appears in a string?
Feb 3, 2009 · You can use string.indexOf('a'). If the char a is present in string : it returns the the index of the first occurrence of the character in the character sequence represented by this …