﻿ Python: Capitalize first and last letters of each word of a given string - w3resource

# 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:

Flowchart:

## 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:

## 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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## 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