#先分析九九乘法表第一個數代表列，第二個數代表行，當列=行時停
#while巢狀中，每個外迴圈對應全部內迴圈，內迴圈對應一行中全部列

#方法1
i = 1
while i <= 9:
    j = 1
    while j <= i:
        print("%d*%d=%d" % (j,i,j*i),end=' ')
        j += 1
    print()
    i += 1

#方法2
i1 = 1
while i1 <= 9:
    j1 = 1
    while j1 <= 9:
        if j1 == i1+1:
            break
        print("%d*%d=%d" % (j1,i1,j1*i1),end=' ')
        j1 += 1
    print()
    i1 += 1

#方法三：for迴圈
for i2 in range(1,10):
    for j2 in range(1,10):
        print("%d*%d=%d" % (j2,i2,j2*i2),end=' ')
        if j2 == i2:
            break
    print()