python_03

bool值、startswith判断是否有该字符串开头

v1 = int(input("请输入一个数字："))
#比较产生bool值
v2 = (v1 == 9)
while v2:
    print("cool")
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print("cool" == "cool")
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v1 = ""
v2 = bool(v1)
print(v2)
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v1 = 3 or 2 < 6
print(v1)
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#进制转换
v1 = int("666",base=16)
print(v1)
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#startswith   判断字符串是否以 XX 开头？得到一个布尔值
v1 = "你是谁"
result = v1.startswith("你是")
print(result) # 值为True

#startswith    判断字符串是否以 XX 开头？得到一个布尔值
v1 = "你是谁"
result = v1.startswith("你是")
print(result) # 值为True
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#实例
v1 = input("where are you from?")
if v1.startswith("beijing"):
    print("北京人")
else:
    print("不是北京人")