y = ⎩ ⎨ ⎧−1 0 1 (x < 0) (x = 0) (x > 0

           z=x

          x=y

         y=z

for i in range(1, 4):for j in range (1, 4):if j%2==0:breakprint (" {:3d)". format (i*j), end='')if i%2==0:break

number=1250 count=0 while number>0: number=number//10 count=count+1 (2分) print(count)