Ruby Code Examples

Here I will provide Ruby Code Examples for all basic ruby programs of String, Array, Logical programs and Number based programs. In Ruby programming language.

Array Based Logical Programs

- Ruby program to remove duplicate values in array

- Program to find the second smallest number in an array in ruby

- Find second largest number from an array in Ruby

- Find smallest element in array without using min function in Ruby

- Find largest element in array without using max function in Ruby

String Based Logical Programs

- Ruby program to remove duplicate characters of a string

- Ruby program to find occurrence of character in string

- Find smallest and longest substring of a string in Ruby

- Ruby program to reverse string without using direct method

- Ruby program to convert full name into initials

- Ruby program to remove common characters from two strings

- Ruby program to remove vowels from string

- Ruby program to search a string in a sentence

Number Based Logical Programs

- Strong number program in Ruby

- Prime number program in Ruby

- Write a Ruby program to check the armstrong number

- Ruby program for random number between two numbers

- Ruby program to check Palindrome Number

- Ruby program to reverse a number

- Ruby program to sum of digits of a number

- Ruby program to calculate generic root

- Write a Ruby program to swap two arrays

- Ruby program to split number into digits

- Ruby program to print perfect numbers from 1 to 1000

- Ruby program to check perfect number

Ruby program to split number into digits

Write a Ruby program to split number into digits

class NumberToDigits
  def printNumberToDigit
    print "Enter the number "
    num = gets.chomp
    print "Digits are: "
    num.split("").each do |n|
      print n+ " "
    end
  end
end

p = NumberToDigit.new 
p.printNumberToDigits

Output:

  
Enter the number  589
Digits are: 5 8 9 

Ruby program to print perfect numbers from 1 to 1000

Write Ruby program to print perfect numbers from 1 to 1000

Perfect Number:  a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself.

class PerfectNumber

  def printPerfectNumbers

    i=1

    sum=0

    (1..1000).each do |n|

      i = 1

      sum = 0

      while i < n do 

        sum = (sum + i) if n % i == 0

        i = i + 1

      end

      puts n if sum == n

    end

  end

end

p = PerfectNumber.new 

p.printPerfectNumbers

Output:

  
6
28
496

Ruby program to check perfect number

Write a Ruby program to check perfect number

Perfect Number:  a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself.

class PerfectNumber
  def checkPerfectNumber
    i=1
    sum=0
    puts "Enter the number"
    n = gets.chomp.to_i
    while i < n do 
      sum = (sum + i) if n % i == 0
      i = i + 1
    end
    if sum == n
      puts "Given number is perfect number"
    else
      puts "Given number is not a perfect number"
    end
  end
end

p = PerfectNumber.new 
p.checkPerfectNumber


Output:

Enter the number
 6
Given number is perfect number
=> ni