python第五章程序练习题

5.2

 def isOdd(a):
     if a%2!=0:
         return True
     else:
         return False a=eval(input())
 print(isOdd(a))

5.3

 def isNum(x):
     try:
         x=eval(x)
         return True
     except NameError:
         return False x=input()
 print(isNum(x))

5.4

 def multi(*a):
     m=1
     for x in a:
         m=m*x
     return m7 x=input().split()
8 lst=[int(i) for i in x]
 print(multi(*lst))

5.5

 from math import sqrt
 def isPrime(n):
     if n == 1:
         return False
     for i in range(2,int(sqrt(n))+1):
         if n % i == 0:
             return False
     return True
 try:
     n = eval(input())
     print(isPrime(n))
 except:
     print("输入错误，请输入一个数字")