Back-End Programming Exam > Back-End Programming Videos > Introduction to Coding with Ruby (in Hindi) > Ruby Programming Tutorial-8-Formatting capitalize; upcase; downcase; reverse
Ruby Programming Tutorial-8-Formatting capitalize; upcase; downcase; reverse Video Lecture | Introduction to Coding with Ruby (in Hindi) - Back-End Programming
FAQs on Ruby Programming Tutorial-8-Formatting capitalize; upcase; downcase; reverse Video Lecture - Introduction to Coding with Ruby (in Hindi) - Back-End Programming
| 1. What is the difference between capitalize, upcase, downcase, and reverse in Ruby programming? |  |
Ans. In Ruby programming, the following methods can be used for formatting strings:
- capitalize: This method capitalizes the first character of a string and converts the rest of the characters to lowercase.
- upcase: This method converts all characters in a string to uppercase.
- downcase: This method converts all characters in a string to lowercase.
- reverse: This method reverses the order of characters in a string.
| 2. How can I capitalize only the first letter of each word in a string using Ruby? | |
Ans. To capitalize the first letter of each word in a string, you can use the `split` method to separate the string into an array of words, then use the `capitalize` method on each word, and finally join the words back together using the `join` method.
Example:
```ruby
sentence = "hello world"
capitalized_sentence = sentence.split.map(&:capitalize).join(" ")
puts capitalized_sentence
```
Output: "Hello World"
| 3. Is there a way to convert a string to all uppercase or all lowercase without modifying the original string in Ruby? | |
Ans. Yes, in Ruby, you can use the `upcase` and `downcase` methods to convert a string to all uppercase or all lowercase, respectively, without modifying the original string. These methods return a new string with the converted case.
Example:
```ruby
string = "Hello World"
uppercase_string = string.upcase
lowercase_string = string.downcase
puts uppercase_string
puts lowercase_string
```
Output:
```
HELLO WORLD
hello world
```
| 4. How can I reverse the order of characters in a string using Ruby? | |
Ans. To reverse the order of characters in a string, you can use the `reverse` method in Ruby. This method returns a new string with the characters in reverse order.
Example:
```ruby
string = "Hello World"
reversed_string = string.reverse
puts reversed_string
```
Output: "dlroW olleH"
| 5. Can I use the formatting methods in Ruby to modify the original string? | |
Ans. No, the formatting methods such as `capitalize`, `upcase`, `downcase`, and `reverse` in Ruby do not modify the original string. Instead, they return a new string with the desired formatting. If you want to modify the original string, you need to assign the result of the formatting method to the original string variable.
Example:
```ruby
string = "hello world"
string.capitalize! # Modifies the original string
puts string
string = "hello world"
capitalized_string = string.capitalize # Does not modify the original string
puts capitalized_string
```
Output:
```
Hello world
Hello world
```
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Nov 22, 2024 Last updated |
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