count uppercase and lowercase in python code example

Example 1: Count lower case characters in a string

def n_lower_chars(string):
    return sum([int(c.islower()) for c in string])

Example 2: converting capital letters to lowercase and viceversa in python

s=input()
new_str=""
for i in range (len(s)):
    if s[i].isupper():
        new_str+=s[i].lower()
    elif s[i].islower():
        new_str+=s[i].upper()
    else:
        new_str+=s[i]
print(new_str)

Example 3: from uppercase to lowercase python

# By Alan W. Smith and Petar Ivanov
s = "Kilometer"
print(s.lower())

Example 4: Python Program to count the number of lowercase letters and uppercase letters in a string.

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)

Example 5: python 3 calculate uppercase lowercase letter

world = input()
upper,lower = 0,0

for i in world:
    upper+=i.isupper()
    lower+=i.islower()

print("UPPER CASE {0}\nLOWER CASE {1}".format(upper,lower))