1.输入一个5位数字，判断其位数：
val = input("please input a 1-99999 number:")
vals = int(val)
if vals >= 1000:
if vals >=10000:
print("This is 5")
else:
print("This is 4")
else:
if vals >= 100:
print("This is 3")
else:
if vals >= 10:
print("This is 2")
else:
print("this is 1")
2.输入一个数字打印乘法表：
A = input("please input you`r Num:")
NUM = int(A)
sum = 0
for i in range(1,NUM+1):
for j in range(i,NUM+1):
sum =i*j
print(str(i) + "x" + str(j)+"=" + str(sum)+"\t",end=" ")
#print(str(i) + "*" + str(j)+"=" + str(sum))
print() please input you`r Num:9
1x1=1 1x2=2 1x3=3 1x4=4 1x5=5 1x6=6 1x7=7 1x8=8 1x9=9
2x2=4 2x3=6 2x4=8 2x5=10 2x6=12 2x7=14 2x8=16 2x9=18
3x3=9 3x4=12 3x5=15 3x6=18 3x7=21 3x8=24 3x9=27
4x4=16 4x5=20 4x6=24 4x7=28 4x8=32 4x9=36
5x5=25 5x6=30 5x7=35 5x8=40 5x9=45
6x6=36 6x7=42 6x8=48 6x9=54
7x7=49 7x8=56 7x9=63
8x8=64 8x9=72
9x9=81 输入一个数字输出乘法表：
A = input("please input you`r Num:")
NUM = int(A)
sum = 0
for i in range(1,NUM+1):
for j in range(1,i+1):
sum =i*j
print(str(j) + "*" + str(i)+"=" + str(sum)+"\t",end=" ")
#print(str(i) + "*" + str(j)+"=" + str(sum))
print()please input you`r Num:9
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81 3.输如一个数字求其阶乘之和：
如果输入3：和=1x1+1x1x2+1x1x2x3
n = int(input("please input you`r num:"))
a = 1
sum = 0
for i in range(1,n+1):
for j in range(1,i+1):
a *= j
#print("--->a"+ "+"+str(a))
sum += a
a = 1
print(sum)please input you`r num:3
9原文：http://blog.51cto.com/12013190/2107515