print函数默认以空格分隔，换行结尾。
print("H","G",110) print("H","G",110) print("H","G",110)
默认以空格分隔（sep），默认以换行结尾（end）
print("H","r",123,sep="+",end="?") print("H","r",123,sep="——") print("H","r",123,end="Apple") print("111")
#字符串拼接 print("aaaa""bbbb")
#设置间隔符 print("www","lanqiaobei","cn",sep=".")
海伦公式已知三边求三角形面积
#海伦公式已知三边求三角形面积 a = int(input()) b = int(input()) c = int(input()) p = (a + b + c) / 2 s = (p*(p-a)*(p-b)*(p-c))**(1/2) print(6)
运算符的使用
a = 5 b = not a #False c = not b #True d = not(a and c) #False e = ((c-1) or (d+1)) # 0 ro 1 : True print(b,c,d,type(e)) print(e)
练习一
a,b,c= map(int,input().split()) A= a==100 or b == 100 or c == 100 B=(a > 90 and b > 90) or (a > 90 and c > 90) or (b > 90 and c > 90) C= a>80 and b>80 and c>80 if A or B or C: flower += 1 print(A,B,C) print(flower)
练习二
# 四年一闰；百年不闰,四百年再闰 year = int(input()) if year % 4 == 0 and year % 100 != 0: print(f"{year}是闰年") elif year % 400 == 0: print(f"{year}是闰年") else: print(f"{year}是平年")
