Python程序在列表中查找最大数字

Python程序在列表中查找最大数

给定一个数字列表，任务是编写一个Python程序来查找给定列表中的最大数字。

例子：

Input : list1 = [10, 20, 4]
Output : 20

Input : list2 = [20, 10, 20, 4, 100]
Output : 100

方法一：对列表进行升序排序，并打印列表中的最后一个元素。

# Python program to find largest
# number in a list
  
# list of numbers
list1 = [10, 20, 4, 45, 99]
  
# sorting the list
list1.sort()
  
# printing the last element
print("Largest element is:", list1[-1])

输出：

Largest element is: 99

方法 2：使用 max() 方法

# Python program to find largest
# number in a list
  
# list of numbers
list1 = [10, 20, 4, 45, 99]
  
  
# printing the maximum element
print("Largest element is:", max(list1))

输出：

Largest element is: 99

方法 3：在用户提供的输入上查找最大列表元素

# Python program to find largest
# number in a list
  
# creating empty list
list1 = []
  
# asking number of elements to put in list
num = int(input("Enter number of elements in list: "))
  
# iterating till num to append elements in list
for i in range(1, num + 1):
    ele = int(input("Enter elements: "))
    list1.append(ele)
      
# print maximum element
print("Largest element is:", max(list1))

输出：

Enter number of elements in list: 4
Enter elements: 12
Enter elements: 19
Enter elements: 1
Enter elements: 99
Largest element is: 99

方法4：不使用Python中的内置函数：

# Python program to find largest
# number in a list
  
def myMax(list1):
  
    # Assume first number in list is largest
    # initially and assign it to variable "max"
    max = list1[0]
   
    # Now traverse through the list and compare 
    # each number with "max" value. Whichever is 
    # largest assign that value to "max'.
    for x in list1:
        if x > max :
             max = x
      
    # after complete traversing the list 
    # return the "max" value
    return max
  
  
# Driver code
list1 = [10, 20, 4, 45, 99]
print("Largest element is:", myMax(list1))

输出：

Largest element is: 99