def say_hello(): print("hello 1") print("hello 2") print("hello 3") say_hello() def sum_num(): num1 = 10 num2 = 10 sum = num1 + num2 print("%d + %d = %d" % (num1, num2, sum)) sum_num() def sum2_num(n1, n2): print("%d + %d = %d" % (n1, n2, n1 + n2)) sum2_num(10, 20) def sum3_num(n1, n2): return n1 + n2 result = sum3_num(10, 20) print("计算结果是%d" % (result)) #乘法表 def multiple_table(): row = 1 while row <= 9: col = 1 while col <= row: print("%d * %d = %d" % (col, row, row * col), end="\t") col += 1 print("") row += 1 multiple_table() #for循环实现 def mulfor(): for i in range(1,10): for j in range(1,i+1): print("%d * %d = %d" % (j,i,j*i),end="\t") print() mulfor()