Python program to count upper and lower case characters without using inbuilt functions

Str="GeeksForGeeks"
lower=0
upper=0
for i in Str:
      if(i.islower()):
            lower+=1
      else:
            upper+=1
print("The number of lowercase characters is:",lower)
print("The number of uppercase characters is:",upper)

# Python3 program to count upper and
# lower case characters without using
# inbuilt functions
def upperlower(string):

    upper = 0
    lower = 0

    for i in range(len(string)):
        
        # For lower letters
        if (ord(string[i]) >= 97 and
            ord(string[i]) <= 122):
            lower += 1

        # For upper letters
        elif (ord(string[i]) >= 65 and
            ord(string[i]) <= 90):
            upper += 1

    print('Lower case characters = %s' %lower,
        'Upper case characters = %s' %upper)

# Driver Code
string = 'GeeksforGeeks is a portal for Geeks'
upperlower(string)

s = "The Geek King"
l,u = 0,0
for i in s:
    if (i>='a'and i<='z'):
        
        # counting lower case
        l=l+1                
    if (i>='A'and i<='Z'):
        
        #counting upper case
        u=u+1
        
print('Lower case characters: ',l)
print('Upper case characters: ',u)

# Python3 program to count upper and
# lower case characters without using
# inbuilt functions
string = 'GeeksforGeeks is a portal for Geeks'
upper = 0
lower = 0
up="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
lo="abcdefghijklmnopqrstuvwxyz"
for i in string:
    if i in up:
        upper+=1
    elif i in lo:
        lower+=1
print('Lower case characters = %s' %lower)
print('Upper case characters = %s' %upper)

import operator as op
Str = "GeeksForGeeks"
lower = "abcdefghijklmnopqrstuvwxyz"
l = 0
u = 0
for i in Str:
    if op.countOf(lower, i) > 0:
        l += 1
    else:
        u += 1
print("The number of lowercase characters is:", l)
print("The number of uppercase characters is:", u)