# Ruby program to add two integer numbers

To add numbers in ruby we will use below methods

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: Convert String to Integer.
+: It is a mathematical operator which accepts two numerical parameters and returns a numerical value. A binary operator to add two values

 # input the numbers and converting  # them into integer  puts "Enter first value: " num1=gets.chomp.to_i puts "Enter second value: " num2=gets.chomp.to_i # finding sum  sum=num1+num2 # printing the result puts "The sum is #{sum}"

Code Explantion:

Step 1: User Enter the first number and assign it to num1

Step 2: User Enter the second number and assign it to num2

Step 3: By using the addition operator "+" we will add num1+num2 and assign the result value to sum

Step 4: Print the addition of two numbers as sum

Output

 First run: Enter first value: 123 Enter second value: 234 The sum is 357 Second run: Enter first value: -123 Enter second value: 100 The sum is -23

Ruby Program to Sum of All Even Numbers

 =begin Ruby program to calculate the sum of even numbers upto n =end sum=0 puts "Enter number to calculate sum of even numbers:" n=gets.chomp.to_i i=1 while(i<=n)     if(i%2==0)     #using % operator         sum=sum+i         i=i+1     else         i=i+1     end end puts "The sum of even numbers below #{n} is #{sum}"

Output:

The sum of even numbers below 24 is 156

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