How to get the 1st letter of each word capital in a string of sentence using loops but not methods? in python

Question

my_str = 'peter piper picked a peck of pickled peppers.'

word= ' '
out = ''

for i in range(len(my_str)):
    if my_str[i] ==' ':
    out = out + word.title()
    word =' '
else:
    word = word + my_str[I]
out = out + word.title()
print(out)

I am getting results using methods inside the loop... How can I get the same result using loops but not methods?

Answer 1

You could get the capital of a character without using a built-in method by using this function. It loops through ascii_lowercase and once the element of it is equal to the character you passed, it returns the element in the corresponding index from ascii_lowercase .

from string import ascii_lowercase, ascii_uppercase    

def get_title(letter):
    for index in range(len(ascii_lowercase)):
        if ascii_lowercase[index] == letter:
            return ascii_uppercase[index]

So essentially, if you want to get the capital of each first letter, you could try this.

my_str = 'peter piper picked a peck of pickled peppers.'
my_str += " "

word = ""
sentence = ""
for char in my_str:
    if char == " ":
        sentence += get_title(word[0]) + word[1:len(word)] + " "
        word = ""
    else:
        word += char

print(sentence)

Here, each word is stored when there is a space which is why a space is added to the end of my_str initially. After getting the word, the first element of word (capitalized with get_title ) and the rest is added to sentence .

Answer 2

Here is a very naive method without any string method. In summary keep a flag True on spaces. If the flag is set and you have a lowercase letter, make it uppercase. Then set the flag False.

my_str = 'peter piper picked a peck of pickled peppers.'

out = ''
up = True

low, high = ord('a'), ord('z')
shift = ord('A') - low
for char in my_str:
    o = ord(char)
    if up:
        if low <= o <= high:
            char = chr(o+shift)
        up = False
    if char == ' ':
        up = True
    out += char

out

Output: 'Peter Piper Picked A Peck Of Pickled Peppers.'

NB. This is less efficient than using string methods, in particular due to the repeated string concatenation. Also this only works on ASCII letters.

Answer 3

ord is used to convert it to unicode and then minus that value with 32 to make it capitalize and in final step chr it convert back to character

a = 'this is awesome'
b = ''
for each in range(0,len(a)):
    if each == 0 or a[each-1] == ' ':
        x = ord(a[each])
        y = x - 32
        z = chr(y)
    else:
        z = a[each]
    b += z

---

Output

This Is Awesome