目录
7-2 jmu-python-判断闰年
year=eval(input())
if (year%4==0 and year%100!=0) or year%400==0:
print(f"{year}是闰年")
else:
print(f"{year}不是闰年")
7-3 jmu-python-素数
n=int(input())
if n>1:
for i in range(2,n):
if n%i == 0 :
print(f"{n} is not prime")
break
else:
print(f"{n} is prime")
else:
print(f"{n} is not prime")
7-4 jmu-python-找字符
n=input()
u=input()
a=n.find(u)+1
if a==0:
print(f"can't find letter {u}")
else:
print(f'index={a}'