Conversion Of String To Upper Case Without Inbuilt Methods

I am trying to perform conversion from a lowercase to uppercase on a string without using any inbuilt functions (other than ord() and char()). Following the logic presented on a di

Solution 1:

You need to execute ord() for each character of your input string. instead of the input string:

defuppercase(str_data):
    return''.join([chr(ord(char) - 32) for char in str_data iford(char) >= 65])

print(uppercase('abcdé--#'))
>>> ABCDÉ

Without join:

defuppercase(str_data):
    result = ''for char in str_data:
        iford(char) >= 65:
            result += chr(ord(char) - 32)
    return result
print(uppercase('abcdé--#λ'))
>>> ABCDÉΛ

Solution 2:

The best way, in my opinion is using a helper string, representing the alphabet, if you do not want to use chr() and ord():

def toUppercase(s):
    alphabet ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'result=''for x in s:
        if x notin alphabet or alphabet.index(x)>=26:
            result+= x
        else:
            result+= alphabet[alphabet.index(x)+26]
    returnresult

This also handles punctuation such as ; or ..

---

Update:

As per the OP's request, this is a version without index():

def toUppercase(s):
    alphabet ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'result=''for x in s:
        for pos inrange(52):
            if alphabet[pos] == x:
                i = pos
        if x notin alphabet or i>=26:
            result+= x
        else:
            result+= alphabet[i+26]
    returnresult

print(toUppercase('abcdj;shjgh'))

Solution 3:

Here is a program to convert the string to uppercase without using inbuilt functions:

Str1=input("Enter the string to be converted uppercase: ")

for i inrange (0,len(Str1)):

   x=ord(Str1[i])
   if x>=97and x<=122:
       x=x-32
   y=chr(x)
   print(y,end="")

Solution 4:

ord()- Return the Unicode code point for a one-character string.

You have to send a one character string as an argument. Here, you are sending the string 'abcd' which has 4 characters which is causing the issue. Send each character separately to the function and thus do 4 calls to the function to get the result.

Solution 5:

The below-simplified code help to convert Lower-case alphabets to Upper-case alphabets using a simple calculation

code :

deftoUppercase(string):
    convertedCharacter = ''for i in string: 
         convertCharacter += chr( ( (ord(i)) -32) ) 
    return convertCharacter