# Square the number def sqr(x) return x*x end # See how it works. (rand(4) + 2).times { a = rand(300) print a,"^2 = ", sqr(a), "\n" } print "\n" # Don't need a parm. def boom print "Boom!\n" end boom boom # Default parms print "\n" def line(cnt, ender = "+", fill = "-") print ender, fill * cnt, ender, "\n" end line(8) line(5,'*') line(11,'+','=') # Do they change? def incr(n) n = n + 1 end a = 5 incr(a) print a,"\n"