循环语句

Posted 2021-12-14 zyg-ayy

# 1.循环打印"人生苦短，及时行乐。"
while True:
    print(‘人生苦短，及时行乐‘)

# 2.while后加入条件
while 1 > 0:
    print(‘人生苦短，不如去死‘)

# 3.数字相加
count = 1
count = count + 1
print(count)

# 4.通过循环，让count每次循环都+1
count = 1
while True:
    print(count)
    count = count + 1  # 将变量count重新赋值之后再输出

# 5.通过循环，打印1，2，3....10
count = 1
while count <= 10:
    print(count)
    count = count + 1

# 6.通过循环，打印1，2，3，4，5，6，8，9，10
# ①先打印1到6，再打印8到10
count = 1
while count <= 6:
    print(count)
    count = count + 1
count = 8
while count <= 10:
    print(count)
    count = count + 1

# ②在while中嵌套一个if实现
count = 1
while count <= 10:
    if count != 7:
        print(count)
    count = count + 1

# ③.引入pass
count = 1
while count <= 10:
    if count == 7:
        pass  # 当执行到count = 7时，直接跳过
    else:
        print(count)
    count = count + 1  # 变量count是在while的下一级

# 7.关键字break
while True:
    print(666)
    break  # 注：终止当前循环
print(‘结束‘)

# 练习1：通过break实现1~10
count = 1
while True:
    print(count)
    count = count + 1
    if count == 11:
        break
print(‘结束‘)

# break始终终止当前循环
while True:
    print(‘你好！‘)
    while True:
        print(666)
        break
    break

# 关键字continue
count = 1
while True:
    print(count)
    continue  # 本次循环不再继续往下走，回到while条件位置
    count = count + 1
# 练习1~10，不打印7
count = 1
while count <= 10:
    if count == 7:
        count = count + 1
        continue
    print(count)
    count = count + 1

# 9.while else
count = 1
while count <= 10:
    print(count)
    count = count + 1
else:  # 不再满足while条件或条件=False时执行此步骤
    print(‘ELSE代码块‘)