1、打印九九乘法表
for i in range(1,10):
for j in range(1,i+1):
print(str(j) + '*' + str(i) + '=' + str(i*j),end=' ')
print()
2、打印以下ling菱形
for i in range(-3,4):
if i<0:
prespace = -i
else:
prespace = i
print(' '*prespace + '*'*(7-prespace*2))
3、打印100以内的的斐波那契数列
print(0)
print(1)
a = 0
b = 1
while True:
c = a + b
if c > 100:
break
else:
a = b
b = c
print(c)
4、求斐波那契数列第101项
a = 1
b = 1
index = 2
print('{0},{1}'.format(0,0))
print('{0},{1}'.format(1,1))
print('{0},{1}'.format(2,1))
while True:
c = a + b
a = b
b = c
index += 1
print('{0},{1}'.format(index,c))
if index == 101:
break
5、求10万内的所有素数
for x in range(3,100000,2):#舍弃掉所有偶数
for i in range(3,int(x ** 0.5) + 1,2):#外层循环已经过滤了偶数,既然没有偶数,就不用对2取模了
if x % i == 0:
break
else:
print(x)