1. program to get input from user

puts("Enter Your Name")
name = gets
puts "Name is #{name}"

2. Write a program to add two integers

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) + Integer(number2)
puts "Sum is #{number3}"

3. Write a program to subtract two numbers

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) - Integer(number2)
puts "Difference is #{number3}"

4. Write a program to multiply two numbers

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) * Integer(number2)
puts "Product is #{number3}"

5. Write a program to divide two numbers

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) / Integer(number2)
puts "Quotient is #{number3}"

6. Write a program to find remainder of two numbers

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) % Integer(number2)
puts "Remainder is #{number3}"

7. Write a program to get a float value

puts("Enter First Number in Decimal Part")
number1 = Float(gets)
puts "Fractional Number is #{number1}"

8. Write a program to find sum of two decimal number values

puts("Enter First Number in Decimal Part")
number1 = Float(gets)
puts("Enter Second Number in Decimal Part")
number2 = Float(gets)
number3=number1+number2
puts "Sum of Fractional Numbers is #{number3}"

9. Write a program to get a string and display string

puts("Enter a String")
name=gets
puts "String you entered is #{name}"

10. Write a program to demonstrate ** operator to find a raise to power b

puts("Enter First Number")
number1 = gets
puts("Enter Second Number")
number2 = gets
number3=Integer(number1) ** Integer(number2)
puts "a raise to power b is #{number3}"

11. program to find area of square based on side

puts("Enter Side of Square")
number1 = Integer(gets)
area=number1*4
puts "area of square is #{area}"

12. program to find circumference of circle

puts("Enter Radius of Circle")
radius = Float(gets)
area=2*3.14*radius
puts "area of circle is #{area}"

13. program to find area of rectangle based on length and breadth

puts("Enter Length of Rectangle")
length = Integer(gets)
puts("Enter Breadth of rectangle")
breadth=Integer(gets)
area=length*breadth
puts "area of rectangle is #{area}"

14. program to find perimeter of rectangle

puts("Enter Length of Rectangle")
length = Integer(gets)
puts("Enter Breadth of rectangle")
breadth=Integer(gets)
perimeter=2*(length+breadth)
puts "perimeter of rectangle is #{perimeter}"

15. program to find simple interest

puts("Enter Principal Amount")
p = Float(gets)
puts("Enter Rate of Interest")
r=Float(gets)
puts("Enter Time in Years")
t=Float(gets)
si=(p*r*t)/100
puts "Simple Interest is #{si}"

16. Example of += Short hand assignment operator

puts("Enter a number")
a=Integer(gets)
a+=5
puts "Value of a is #{a}"