九九乘法表

#正三角九九乘法表：
a = 1
while a <= 9:
 b = 1
 while b <= a:
  c = a * b
  print(str(b)+"*"+str(a)+"="+str(a * b),end = "\t")
  b += 1
 print()
 a += 1
 
 
#倒三角九九乘法表：
a = 9
while a >= 1:
 b = a
 while b >= 1:
  c = a * b
  print(str(b)+"*"+str(a)+"="+str(a * b),end = "\t")
  b -= 1
 print()
 a -= 1
 
a = 9
while a >= 1:
 b = 1
 while b <= a:
  print(str(b)+"*"+str(a)+"="+str(a * b),end = "\t")
  b += 1
 print()
 a -= 1