Python String isupper() Method

​The isupper() function checks if the characters in a string are uppercase. If the characters in the string are uppercase, it will return the boolean value True. Otherwise, it will return the boolean value False.

 string.isupper () 

Example:

# Define a variable composed of uppercase letters
string = "LEARN PYTHON WITH AHMED OBAID"
#isupper function call
result = string. isupper() # returns True
# Print the result
print(result)
# Define a variable composed of lowercase and uppercase letters
string = "Learn Python with Ahmed Obaid"
#isupper function call
result = string. isupper() # returns False
# Print the result
print(result)
# Define a variable made up of lowercase letters
string = "learn python with ahmed obaid"
#isupper function call
result = string. isupper() # returns False
#undefined Print the result
 print(result)

 The output will be:

 True
 False
 False

 The isupper() function always returns the boolean value True. If the string contains uppercase letters, numbers and symbols.

Example:

 # Define a variable consisting of uppercase letters, numbers and symbols
 string = "@Ahmed Obaid 2023"
 #isupper function call
 result = string. isupper() # returns True
 # Print the result
 print(result)

 The output will be:

 True

 The isupper() function always returns a boolean False if the string contains only numbers and symbols. Without capital letters.

Example:

 # Define a variable consisting of numbers and symbols
 string = "100$"
 #isupper function call
 result = string. isupper() # returns False
 # Print the result
 print(result)

 The output will be:

 False

 External sources:

 Built-in functions - official Python documentation

 If you have any questions or concerns, leave them in the comments