文章目录
条件结构
操作代码块
# if语句
a = int(input("请输入你的年龄:"))
if a < 18:
print("未成年")
# if else语句
a1 = int(input("请输入你的年龄:"))
if a1 < 19:
print("未成年")
else:
print("成年")
# if elif else语句
a2 = int(input("请输入你的年龄:"))
if a2 >= 18:
print("成年了")
elif 0 < a2 < 18:
print("未成年")
else:
print("你输入的可能不是年龄")
# 嵌套
a3 = int(input("请输入你的余额:"))
if a3 > 50000:
print("买个手机")
if a3 > 500000:
print("买辆新车")
else:
print("买辆二手车")
else:
print("不买了,存够钱了再来买")
循环结构
操作代码块
import random # 导入随机数
# while循环
# break语句:结束循环体
#continue跳出本次循环
#break结束当前循环
a = 5
while a < 10:
print("a")
a += 1
# 猜数字游戏
a1=True
print("请输入你的数字:")
while a1:
a2=int(input())
if a2<50:
print("太小了,重新猜:")
elif a2>50:
print("太大了,重新猜:")
else:
if a2==50:
print("恭喜你猜对了!")
a1=False #break
# for循环
a = "12345678gfhkl"
for b in a:
print(b)
# range语句
# 用range遍历注意取头不取尾
for b in range(10): # 遍历0-10的数字,但不包含10
print(b) # 输出是0-9
for b1 in range(3, 9): # 遍历3-9的数字,但不包含9
print(b1) # 输出为3-8
for b2 in range(2, 14, 3): # 遍历2-14的数字,且两数之前隔3
print(b2) # 输出2,5,8,11
# for嵌套
for b3 in range(1, 11):
print("第%d次" % b3)
for b4 in range(1, 6):
print("i love you%d" % b4)
# 九九乘法表
for b5 in range(1, 10):
for n in range(1, b5 + 1):
print(f"{n}*{b5}={n * b5}\t", end="")
print()
for b4 in range(1, 6):
print("i love you%d" % b4)
# 九九乘法表
for b5 in range(1, 10):
for n in range(1, b5 + 1):
print(f"{n}*{b5}={n * b5}\t", end="")
print()