구구단 for while format

while dan<10:
    while i<10:
        print(f"{dan} x {i} = {dan*i}")
        i += 1
    dan+=1
    print("\n")
    i=1

 

for dan in range (2,10):
    for i in range(1,10):
        print ("{0} x {1} = {2}". format(dan, i, dan*i))
    print("\n")