CODEWITHSUNDEEP
pythonstringfor-loopiterationlowercase
iaianmcd
iaianmcd

Reputation: 117

python making my own lower case converter

I am new to programming and I need some help for an free online tutorial to learn Python. I am building my own method to convert a an input string to all lower cases. I cannot use the string.lower() method. In the code I have so far I cannot figure out how to separate the input string into characters that can be inputed into my character converter lowerChar(char). 

string=input #input string


def lowerChar(char):              #function for converting characters into lowercase
   if ord(char) >= ord('A') and ord(char)<=ord('Z'):
      return chr(ord(char) + 32)
   else:
      return char

def lowerString(string):     #function for feeding characters of string into lowerChar
   result = ""
  for i in string:
     result = result + lowerChar(string[i])
     return result

Upvotes: 2

Views: 4218

Answers (5)

Rafik Azouz
Rafik Azouz

Reputation: 1

Try something like this:

def lowerChar(c):
    if 'A' <= c <= 'Z':
        return chr(ord(c) - ord('A') + ord('a'))
    else:
        return c

def lowerString(string):
    result = ""
    x=0

    for i in string:
        while x < len(string):
           result = result + lowerChar(string[x])
           x+=1

        return result

Upvotes: 0

Pifko6
Pifko6

Reputation: 17

My solution:

string = input("Input one liner: ")

def lowerChar(char):
    if char >= 65 and char <= 90:
        char = chr(char + 32)
        return char
    else:
        char = chr(char)
        return char


def lowerString(string):
    result = ""
    for i in range(0, len(string)):
        result = result + lowerChar(ord(string[i]))
    return result

print(lowerString(string))

Upvotes: 0

Supriya Dsouza Hogen Esch
Supriya Dsouza Hogen Esch

Reputation: 41

A tip: You don't need to use ord(). Python can directly do the following comparision:

if char >= 'A' and char<='Z':

Upvotes: 1

mr2ert
mr2ert

Reputation: 5186

You are really close: 

def lowerString(string):
  result = ""
  for i in string:
     # i is a character in the string
     result = result + lowerChar(i)
  # This shouldn't be under the for loop
  return result

Strings are iterable just like lists!

Also, make sure to be careful about your indentation levels, and the number of spaces you use should be consistent.

Upvotes: 3

user1786283
user1786283

Reputation:

You are returning only the first letter, you have to return in a outer scope, try this, also it is better to use += instead of result = result + lowerChar(i) 

def lowerString(string):     #function for feeding characters of string into lowerChar
  result = ""
  for i in string:
     result  += lowerChar(i) 
  return result

print lowerString("HELLO") #hello

Upvotes: 1

Related Questions