for a in range(10):
    print(a)

a=1
while True:
    print(a)
    if a==3:
        break
    a=a+1

a=1
while True:
    print(a)
    if a==3:
        continue
    a=a+1

a=[1,0,2]
for i in a:
    if not i:
        continue
    print(i)