Basic I/O I

io3.rb

File I/O

print "Triangle height: "
h = gets.to_f;
print "Triangle width: "
w = gets.to_f;
area = 0.5*h*w
print "Triangle height ", h, " width ", w, " has area ", area, "\n"

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Similar to the last one, the to_f method of class String converts the input string to a floating-point number.

Basic I/O I

File I/O