In the previous article, we have discussed Python String zfill() Method with Examples
islower() Method in Python:
If all of the characters are in lower case, the islower() method returns True; otherwise, it returns False.
Only alphabet characters are checked, not numbers, symbols, or spaces.
Syntax:
string.islower()
Parameters: This function has no parameters.
Return Value:
The islower() method gives:
- True if all of the alphabets in the string are lowercase.
- If the string contains at least one uppercase alphabet, this function returns False.
Examples:
Example1:
Input:
Given string = 'welcome to python-programs' Given string = '1234 Hello ALL @' Given string = 'good morning btechgeeks 12345 @#!'
Output:
The given string = welcome to python-programs Checking if the given string has all lowercase characters or not = True The given string = 1234 Hello ALL @ Checking if the given string has all lowercase characters or not = False The given string = good morning btechgeeks 12345 @#! Checking if the given string has all lowercase characters or not = True
Example2:
Input:
Given string = 'hello this is btech_geeks' Given string = 'ThIs IS a PYThon learning PLATform' Given string = '#### hello everyone ##%%$12346'
Output:
The given string = hello this is btech_geeks Checking if the given string has all lowercase characters or not = True The given string = ThIs IS a PYThon learning PLATform Checking if the given string has all lowercase characters or not = False The given string = #### hello everyone ##%%$12346 Checking if the given string has all lowercase characters or not = True
String islower() Method Examples in Python
Method #1: Using Built-in Functions (Static Input)
Approach:
- Give the string as static input and store it in a variable.
- Apply islower() function to the given string in which if all of the characters are in lower case, the islower() method returns True; otherwise, it returns False.
- Store it in another variable.
- Print the above-given String.
- Print the result after checking if the given string has all lowercase characters or not.
- Similarly, do the same for other strings and print the result.
- The Exit of Program.
Below is the implementation:
# Give the string as static input and store it in a variable.
gvn_strng1 = 'welcome to python-programs'
# Apply islower() function to the given string in which if all of the characters
# are in lower case, the islower() method returns True; otherwise, it returns False.
# Store it in another variable.
rslt_1 = gvn_strng1.islower()
# Print the above-given String.
print("The given string = ", gvn_strng1)
# Print the result after checking if the given string has all lowercase
# characters or not.
print("Checking if the given string has all lowercase characters or not = ", rslt_1)
# Similarly, do the same for other strings and print the result.
gvn_strng2 = '1234 Hello ALL @'
rslt_2 = gvn_strng2.islower()
print("The given string = ", gvn_strng2)
print("Checking if the given string has all lowercase characters or not = ", rslt_2)
gvn_strng3 = 'good morning btechgeeks 12345 @#!'
rslt_3 = gvn_strng3.islower()
print("The given string = ", gvn_strng3)
print("Checking if the given string has all lowercase characters or not = ", rslt_3)
Output:
The given string = welcome to python-programs Checking if the given string has all lowercase characters or not = True The given string = 1234 Hello ALL @ Checking if the given string has all lowercase characters or not = False The given string = good morning btechgeeks 12345 @#! Checking if the given string has all lowercase characters or not = True
Method #2: Using Built-in Functions (User Input)
Approach:
- Give the string as user input using the input() function and store it in a variable.
- Apply islower() function to the given string in which if all of the characters are in lower case, the islower() method returns True; otherwise, it returns False.
- Store it in another variable.
- Print the above-given String.
- Print the result after checking if the given string has all lowercase characters or not.
- Similarly, do the same for other strings and print the result.
- The Exit of Program.
Below is the implementation:
# Give the string as user input using the input() function and store it in a variable.
gvn_strng1 = input("Enter some Random String = ")
# Apply islower() function to the given string in which if all of the characters
# are in lower case, the islower() method returns True; otherwise, it returns False.
# Store it in another variable.
rslt_1 = gvn_strng1.islower()
# Print the above-given String.
print("The given string = ", gvn_strng1)
# Print the result after checking if the given string has all lowercase
# characters or not.
print("Checking if the given string has all lowercase characters or not = ", rslt_1)
# Similarly, do the same for other strings and print the result.
gvn_strng2 = input("Enter some Random String = ")
rslt_2 = gvn_strng2.islower()
print("The given string = ", gvn_strng2)
print("Checking if the given string has all lowercase characters or not = ", rslt_2)
gvn_strng3 = input("Enter some Random String = ")
rslt_3 = gvn_strng3.islower()
print("The given string = ", gvn_strng3)
print("Checking if the given string has all lowercase characters or not = ", rslt_3)
Output:
Enter some Random String = hello btechgeeks The given string = hello btechgeeks Checking if the given string has all lowercase characters or not = True Enter some Random String = ThIS IS a pytHON learning PLATform The given string = ThIS IS a pytHON learning PLATform Checking if the given string has all lowercase characters or not = False Enter some Random String = ###% hello everyone #$* The given string = ###% hello everyone #$* Checking if the given string has all lowercase characters or not = True
Go through our tutorial and learn about various Python String Method Examples and learn how to apply the knowledge while dealing with strings.