目录
1、用for循环实现1~100求和
sum = 0
for x in range(1, 101):
sum += x
print(sum)2、用for循环实现1~100之间的偶数求和
#左闭右开，步长是2
sum = 0
for x in range(2, 101, 2):
sum += x
print(sum)3、输入非负整数n计算n!
n = int(input('n = '))
result = 1
for x in range(1, n + 1):
result *= x
print('%d! = %d' % (n, result))4、输入一个正整数判断它是不是素数
from math import sqrt
num = int(input('请输入一个正整数: '))
end = int(sqrt(num))
is_prime = True
for x in range(2, end + 1):
if num % x == 0:
is_prime = False
break
if is_prime and num != 1:
print('%d是素数' % num)
else:
print('%d不是素数' % num)5、输入两个正整数计算最大公约数和最小公倍数
x = int(input('x = '))
y = int(input('y = '))
if x > y:
(x, y) = (y, x)
for factor in range(x, 0, -1):
if x % factor == 0 and y % factor == 0:
print('%d和%d的最大公约数是%d' % (x, y, factor))
print('%d和%d的最小公倍数是%d' % (x, y, x * y // factor))
break6、打印各种三角形图案
row = int(input('请输入行数: '))
#for _ in list中的下划线_只是一个临时的循环变量, 因为_是合法的变量名
#for _ in [1, 2, 3]:print(_)
for i in range(row):
for _ in range(i + 1):
print('*', end='')
print()
for i in range(row):
for j in range(row):
if j < row - i - 1:
print(' ', end='')
else:
print('*', end='')
print()
for i in range(row):
for _ in range(row - i - 1):
print(' ', end='')
for _ in range(2 * i + 1):
print('*', end='')
print()7、用while循环实现1~100求和
sum = 0
num = 1
while num <= 100:
sum += num
num += 1
print(sum)8、用while循环实现1~100之间的偶数求和
sum = 0
num = 2
while num <= 100:
sum += num
num += 2
print(sum)我是花花，祝自己也祝您变强了~