Check if all characters of a string are uppercase in python

Check if all characters of a string are uppercase in python

You can use the str.isupper() method to check if all characters in a string are uppercase. This method returns True if all characters in the string are uppercase, and False otherwise. Here's how you can use it:

text = "HELLO" if text.isupper(): print("All characters are uppercase.") else: print("Not all characters are uppercase.")

In this example, the string "HELLO" contains only uppercase characters, so the output will be:

All characters are uppercase.

If the string contained any lowercase characters, the output would be:

Not all characters are uppercase.

Keep in mind that the isupper() method considers non-alphabetic characters as well. If you only want to check alphabetic characters, you might need to preprocess the string to remove non-alphabetic characters before using isupper().

Examples

  1. Python code to check if all characters in a string are uppercase:

    • "How to determine if all characters in a string are uppercase in Python?"
    • Description: This code snippet uses the isupper() method to check if all characters in a string are uppercase.
    my_string = "HELLO" if my_string.isupper(): print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  2. Using for loop to check if all characters are uppercase in Python:

    • "Check if all characters in string are uppercase using for loop in Python"
    • Description: This code iterates through each character in the string and checks if it is uppercase using the isupper() method.
    my_string = "HELLO" all_upper = all(char.isupper() for char in my_string) if all_upper: print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  3. Python code to check if a string contains only uppercase letters:

    • "How to check if a string contains only uppercase letters in Python?"
    • Description: This code checks if all characters in the string are alphabetic and uppercase using the isalpha() and isupper() methods.
    my_string = "HELLO" if my_string.isalpha() and my_string.isupper(): print("All characters are uppercase letters.") else: print("Not all characters are uppercase letters.")

  4. Using regular expressions to check if all characters are uppercase in Python:

    • "Check if all characters in string are uppercase using regex in Python"
    • Description: This code utilizes a regular expression to match only uppercase letters in the string.
    import re my_string = "HELLO" if re.fullmatch('[A-Z]+', my_string): print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  5. Python code to verify if all characters in string are uppercase using ASCII values:

    • "How to check if all characters in string are uppercase using ASCII values in Python?"
    • Description: This code checks if all characters in the string have ASCII values corresponding to uppercase letters.
    my_string = "HELLO" all_upper = all(65 <= ord(char) <= 90 for char in my_string) if all_upper: print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  6. Using list comprehension to check if all characters are uppercase in Python:

    • "List comprehension to check if all characters in string are uppercase in Python"
    • Description: This code uses list comprehension to generate a list of boolean values indicating if each character is uppercase, then checks if all values are True.
    my_string = "HELLO" all_upper = all([char.isupper() for char in my_string]) if all_upper: print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  7. Python code to check if all characters are uppercase using string comparison:

    • "How to use string comparison to check if all characters are uppercase in Python?"
    • Description: This code compares the original string with its uppercase version to check if they are equal, indicating that all characters are already uppercase.
    my_string = "HELLO" if my_string == my_string.upper(): print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  8. Python code to check if all characters in string are uppercase using map():

    • "Using map() function to check if all characters in string are uppercase in Python"
    • Description: This code applies the str.isupper() function to each character in the string using map(), then checks if all resulting values are True.
    my_string = "HELLO" all_upper = all(map(str.isupper, my_string)) if all_upper: print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  9. Python code to check if all characters are uppercase using lambda function:

    • "Check if all characters in string are uppercase using lambda function in Python"
    • Description: This code uses a lambda function to check if each character in the string is uppercase, then applies all() to the resulting iterable.
    my_string = "HELLO" all_upper = all(map(lambda x: x.isupper(), my_string)) if all_upper: print("All characters are uppercase.") else: print("Not all characters are uppercase.")

  10. Python code to determine if a string has only uppercase characters using set():

    • "Using set() function to check if all characters in string are uppercase in Python"
    • Description: This code converts the string to a set and checks if it contains only uppercase letters, considering any other characters present.
    my_string = "HELLO" if set(my_string).issubset(set("ABCDEFGHIJKLMNOPQRSTUVWXYZ")): print("All characters are uppercase.") else: print("Not all characters are uppercase.")

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