python基础-循环语句

 

 

 

打印出1到100

i=0
while i<=100:
    print(i)
    i+=1

for i in range(1,101):#迭代1到101之间的数字，[1,101)
    print(i)

i=0
while True:
    i+=1
    print(i)
    if i>=100:
        break#结束当前循环

 1到100求和

i=0
j=0
while i<100:
    i+=1
    j=i+j
    print(j)

打印1到100中偶数

i=0
while i<101:
    i+=1
    if (i%2)==0:
        print(i)

for i in range(1,101):
    if (i%2)==0:
        print(i)

打印1到100中奇数

for i in range(1,101):
    if (i%2)!=0:
        print(i)

1 i=0
2 while i<101:
3     i+=1
4     if (i%2)！=0:
5         print(i)

 打印1到100中不包含20至60的数字

i=0
while i<100:
    i+=1
    if i>=20 and i<=60:
        continue#满足条件时跳过循环
    print(i)

for i in range(1,101):
    if i>=20and i<=60:
        continue#满足条件时跳过循环
    print(i)

 打印出1,2,3,4任意3个数字不同组合

for i in range(1,5):
    for j in range(1,5):
        for k in range(1,5):
            if (i!=j)and(i!=k)and(j!=k):
                print(i,j,k)

 求1-2+3-4...+98-99之和

num=0
for i in range(1,100):
    if i%2!=0:
        i=i
    else:
        i=-i
    num=num+i
    print(num)