Conversion of string to upper case without inbuilt methods

Question

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

Answer 1

def uppercase(str_data):
   ord('str_data')
   str_data = str_data -32
   chr('str_data')
   return str_data
print(uppercase('abcd'))

in this code ord takes single character as an argument but you have given more than one that's why it's showing an error. Take single character at a time convert it to upper case and make a single string like below.

def convert_to_lower(string):
    new="" 
    for i in string:
       j=ord(i)-32  #we are taking the ascii value because the length of lower 
             #case to uppercase is 32 so we are subtracting 32

       if 97<=ord(i)<=122 :  #here we are checking whether the charecter is lower
                      # case or not if lowercase then only we are converting into
                      #uppercase
           new=new+chr(j)
       else:  #if the character is not the lowercase alplhaber we are taking as it is
           new=new+i
    print(new)

convert_to_lower("hello world")