Python Program to Convert String to Lowercase

Write a Python program to Convert String to Lowercase using Lower(), For Loop, while loop, and ASCII with example.

Python Program to Convert String to Lowercase using Lower() Function

This python program allows the user to enter a string. Next, we used built-in string function called lower() to convert upper case characters in a string to lowercase.

TIP: Please refer String article to understand everything about Strings.

# Python Program to Convert String to Lowercase
 
string = input("Please Enter your Own String : ")

string1 = string.lower()
 
print("\nOriginal String in Uppercase  =  ", string)
print("The Given String in Lowercase =  ", string1)

OUTPUT

Python Program to Convert String to Lowercase using For Loop

This python program allows the user to enter a string. Next, it will find the uppercase letters and covert them to lowercase.

First, we used For Loop to iterate characters in a String. Inside the For Loop, we are using If Else Statement to check whether the character is between A and Z or not. If true, we are adding 32 to its ASCII value otherwise, we are coping that character to string 1.

TIP: Please refer ASCII Value of Total Characters article, and ASCII table to understand the ASCII values.

# Python Program to Convert String to Lowercase
 
string = input("Please Enter your Own String : ")
string1 = ''

for i in range(len(string)):
    if(string[i] >= 'A' and string[i] <= 'Z'):
        string1 = string1 + chr((ord(string[i]) + 32))
    else:
        string1 = string1 + string[i]
 
print("\nOriginal String in Uppercase  =  ", string)
print("The Given String in Lowercase =  ", string1)

OUTPUT

Program to Convert String to Lowercase using While Loop

This python string uppercase to lowercase conversion program is same as above. However, we just replaced the For Loop with While Loop.

# Python Program to Convert String to Lowercase
 
string = input("Please Enter your Own String : ")
string1 = ''
i = 0

while(i < len(string)): if(string[i] >= 'A' and string[i] <= 'Z'):
        string1 = string1 + chr((ord(string[i]) + 32))
    else:
        string1 = string1 + string[i]
    i = i + 1
 
print("\nOriginal String in Uppercase  =  ", string)
print("The Given String in Lowercase =  ", string1)

OUTPUT

Convert Uppercase String to Lowercase Example 4

This program is same as second example. However, we are using For Loop with Object

# Python Program to Convert String to Lowercase
 
string = input("Please Enter your Own String : ")
string1 = ''

for i in string:
    if(i >= 'A' and i <= 'Z'):
        string1 = string1 + chr((ord(i) + 32))
    else:
        string1 = string1 + i
 
print("\nOriginal String in Uppercase  =  ", string)
print("The Given String in Lowercase =  ", string1)

OUTPUT

Program to Convert String to Lowercase using ASCII Values

In this program we are comparing the ASCII values to check whether there are any uppercase characters. If true, we are converting them to lowercase.

# Python Program to Convert String to Lowercase
 
string = input("Please Enter your Own String : ")
string1 = ''

for i in string:
    if(ord(i) >= 65 and ord(i) <= 90):
        string1 = string1 + chr((ord(i) + 32))
    else:
        string1 = string1 + i
 
print("\nOriginal String in Uppercase  =  ", string)
print("The Given String in Lowercase =  ", string1)

OUTPUT