Input 2 numbers from user, perform calculation and print results.

user_input

#!/usr/bin/ruby

# Request 2 numbers from user and perform calculation
print "Enter value of a: "
a = gets
print "Enter value of b: "
b = gets
print "          a = " + a
print "          b = " + b 
print "b - a + 100 = " , (b.to_i - a.to_i + 100)