Python Program to Calculate the Number of Upper Case Letters and Lower Case Letters in a String

 This is a Python Program to count the number of lowercase letters and uppercase letters in a string.

Problem Description

The program takes a string and counts the number of lowercase letters and uppercase letters in the string.

Problem Solution

1. Take a string from the user and store it in a variable.
2. Initialize the two count variables to 0.
3. Use a for loop to traverse through the characters in the string and increment the first count variable each time a lowercase character is encountered and increment the second count variable each time a uppercase character is encountered.
4. Print the total count of both the variables.
5. Exit.

Program/Source Code

Here is source code of the Python Program to count the number of lowercase characters and uppercase characters in a string. The program output is also shown below.

string=raw_input("Enter string:")
count1=0
count2=0
for i in string:
      if(i.islower()):
            count1=count1+1
      elif(i.isupper()):
            count2=count2+1
print("The number of lowercase characters is:")
print(count1)
print("The number of uppercase characters is:")
print(count2)

Program Explanation

1. User must enter a string and store it in a variable.
2. Both the count variables are initialized to zero.
3. The for loop is used to traverse through the characters in the string.
4. The first count variable is incremented each time a lowercase character is encountered and the second count variable is incremented each time a uppercase character is encountered.
5. The total count of lowercase characters and uppercase characters in the string are printed.

Runtime Test Cases

 
Case 1:
Enter string:HeLLo
The number of lowercase characters is:
2
The number of uppercase characters is:
3
 
Case 2:
Enter string:SanFouNdry
The number of lowercase characters is:
7
The number of uppercase characters is:
3