Ruby Programms of all types :: Most Important :: Run Each and Every Program individually

 https://www.includehelp.com/ruby/programs.aspx

Ruby ::

# The Greeter class
class Greeter
  def initialize(name)
    @name = name.capitalize
  end

  def salute
    puts "Hello #{@name}!"
  end
end

# Create a new object
g = Greeter.new("world")

# Output "Hello World!"
g.salute

Ruby programs/examples

Ruby basic programs

1. Ruby program to print Hello World!

2. Ruby program to add two integer numbers

3. Ruby program to find the area of the rectangle

4. Ruby program to check leap year

5. Ruby program to print power of a number

6. Ruby program to print Fibonacci series

7. Ruby program to check whether the given number is prime or not

8. Ruby program to find factorial of a given number

9. Ruby program to find number of characters in a string (string length)

10. Ruby program to reverse a string

11. Ruby program to reverse a string | Set 2

12. Ruby program to count the number of words in a string

13. Ruby program to print an array as string

14. Ruby program to check whether a variable is defined or not

15. Ruby program to check whether the hash contains specified key or not

16. Ruby program to convert the string into lowercase and uppercase

17. Ruby program to check whether a string contains a substring or not

18. Ruby program to generate random numbers

19. Ruby program to print an array

20. Ruby program to check whether an element exists in an array or not

21. Ruby program to calculate the sum of all even numbers

22. Ruby program to calculate the sum of all odd numbers up to N

23. Ruby program to count the number of digits in a number

24. Ruby program to print multiplication table of a number

25. Ruby program to sort an array with command line arguments

Ruby set programs

Print the elements of a set in Ruby

1. Find the length of a set in Ruby

2. Check the presence of an element in the set in Ruby

3. Join all the elements of two sets in Ruby

4. Find the common elements from two sets in Ruby

5. Find the difference between two sets in Ruby

6. Merge two sets in Ruby

7. Check whether the set is empty or not in Ruby

8. Delete and replace an element from the set in Ruby

Ruby hash programs

How to check if a hash key exists in Ruby

How to add elements to a Hash in Ruby?

TOP Interview Coding Problems/Challenges

Run-length encoding (find/print frequency of letters in a string)

• Sort an array of 0's, 1's and 2's in linear time complexity

• Checking Anagrams (check whether two string is anagrams or not)

• Relative sorting algorithm

• Finding subarray with given sum

• Find the level in a binary tree with given sum K

• Check whether a Binary Tree is BST (Binary Search Tree) or not

• 1[0]1 Pattern Count

• Capitalize first and last letter of each word in a line

• Print vertical sum of a binary tree

• Print Boundary Sum of a Binary Tree

• Reverse a single linked list

• Greedy Strategy to solve major algorithm problems

• Job sequencing problem

• Root to leaf Path Sum

• Exit Point in a Matrix

• Find length of loop in a linked list

• Toppers of Class

• Print All Nodes that don't have Sibling

• Transform to Sum Tree

• Shortest Source to Destination Path

Ruby code to print "Hello World!"

=begin 
Ruby program to print Hello World.
=end

puts "Hello World!"
print "Hello World!"
puts "Hello World!"

Output

Hello World!
Hello World!Hello World!

Adding Two Numbers in Ruby::

Methods Used ::

puts :: This method is used to display some message to the user

gets :: This method is used to take input from the user

.to_i :: When we take input through gets method it is a string.for further calculations it is mandatory to convert it into an integer for exact results and this method returns the integer conversion of the given string

Varibale Used ::

num1 :: to store first value

num2 :: to store second value

sum :: to store the sum i.e. result

Progrm ::

=begin

Ruby program to add two numbers

=end

puts “Enter First Value: ”

num1=gets.chomp.to_i

puts “Enter Second Value:”

num2=gets.chomp.to_i

sum=num1+num2

puts “The sum is #{sum}”

Program ::

=begin

Ruby program to find the area of the Rectangle

=end

puts “Enter Length:”

l=gets.chomp.to_f

puts “Enter width:”

w=gets.chomp.to_f

area=l*w

puts “Area of Rectangle is #{area}”