10.downto(1) {|y| puts y} (1) (-1e10) (0xabcdef) 'y' [x] x->y x.y !x ~x x++ x-- x*y x&y x*y x/y x%y x+y x-y x<<y x>>y x<y x<=y x>y x>=y x==y x!=y x&y x^y x|y x&&y x||y x?y:z x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y x,y