用python来编九九乘法表

# author : momo
a = 1
sum = 0
for i in range(1,10):
    for j in range(1,i+1):
        sum = i*j
        print("%dx%d=%d"%(i,j,sum),end="    ")
    print("")

方法二：

sum1 = 0
n=9
m=1
while n>0:
    y=n
    print("\t\t" *(n-1),end="")
    for x in range(m):
        sum1 = n * y
        print("%dx%d=%d" % (n, y, sum1), end="\t")
        y+=1
    print()
    n-=1
    m+=1

方法三：

sum1 = 0
n=9
m=1
while n>0:
    while m<=n:
        sum1 = m * n
        print("%dx%d=%d" % (m, n, sum1), end="\t")
        m+=1
    print()
    n-=1
    m=1