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Python: Capitalize first and last letters of each word of a given string

Python String: Exercise-60 with Solution

Write a Python program to capitalize first and last letters of each word of a given string.

Sample Solution-1:

Python Code:

def capitalize_first_last_letters(str1):
     str1 = result = str1.title()
     result =  ""
     for word in str1.split():
        result += word[:-1] + word[-1].upper() + " "
     return result[:-1]  
     
print(capitalize_first_last_letters("python exercises practice solution"))
print(capitalize_first_last_letters("w3resource"))

Sample Output:

PythoN ExerciseS PracticE SolutioN
W3ResourcE

Pictorial Presentation:

Python String: Capitalize first and last letters of each word of a given string.

Flowchart:

Flowchart: Capitalize first and last letters of each word of a given string

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Capitalizes the first letter of a string.

  • Use list slicing and str.upper() to capitalize the first letter of the string.
  • Use str.join() to combine the capitalized first letter with the rest of the characters.
  • Omit the lower_rest parameter to keep the rest of the string intact, or set it to True to convert to lowercase.

Python Code:

def capitalize_first_letter(s, lower_rest = False):
  return ''.join([s[:1].upper(), (s[1:].lower() if lower_rest else s[1:])])
 
print(capitalize_first_letter('javaScript'))
print(capitalize_first_letter('python', True))

Sample Output:

JavaScript
Python

Flowchart:

Flowchart: Capitalize first and last letters of each word of a given string

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

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Previous: Write a Python program to find the maximum occuring character in a given string.
Next: Write a Python program to remove duplicate characters of a given string.

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Python: Tips of the Day

Check if a given key already exists in a dictionary:

In is the intended way to test for the existence of a key in a dict.

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")

If you wanted a default, you can always use dict.get():

d = dict()

for i in range(100):
    key = i % 10
    d[key] = d.get(key, 0) + 1

and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:

from collections import defaultdict

d = defaultdict(int)

for i in range(100):
    d[i % 10] += 1

but in general, the in keyword is the best way to do it.

Ref: https://bit.ly/2XPMRyz