def min( x )
	min_value = x[ 0 ]
	(1..x.length-1).each { |i|
		if min_value > x[ i ] then
			min_value = x[ i ]
		end
	}
	return min_value
end

a = [ 3 , 6 , 2 , 4 , 10 , 7 ]
printf( "最小値は%dです\n" , min( a ) )