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創(chuàng)新互聯(lián)Python教程：
寫一個 Python 程序，用 For 循環(huán)、While 循環(huán)和函數(shù)計算列表中的偶數(shù)和奇數(shù)，并給出一個實例。
使用 For 循環(huán)計算列表中偶數(shù)和奇數(shù)的 Python 程序
在這個 python 程序中，我們使用 For 循環(huán)來迭代給定列表中的每個元素。在 Python 循環(huán)中，我們使用 If 語句來檢查和計數(shù)偶數(shù)和奇數(shù)。
# Python Program to Count Even and Odd Numbers in a List
NumList = []
Even_count = 0
Odd_count = 0
Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
value = int(input("Please enter the Value of %d Element : " %i))
NumList.append(value)
for j in range(Number):
if(NumList[j] % 2 == 0):
Even_count = Even_count + 1
else:
Odd_count = Odd_count + 1
print("\nTotal Number of Even Numbers in this List = ", Even_count)
print("Total Number of Odd Numbers in this List = ", Odd_count)在這個 python 程序中，用戶輸入了列表元素= [2，3，5，7]，偶數(shù)計數(shù)= 0，奇數(shù)計數(shù)= 0
對于循環(huán)–第一次迭代:對于范圍(0，4) 中的 0，條件為真。因此，它進入 If 語句T5 If(NumList[0]% 2 = = 0)=>If(2% 2 = = 0)–條件為真 偶數(shù) 計數(shù)=偶數(shù) 計數(shù)+ 1 = > 0 + 1 = 1
第二次迭代:對于范圍(0，4)中的 1–條件為真 如果(NumList[1] % 2 == 0) = >如果(3% 2 = = 0)–條件為假 那么，它進入 Else 塊。 奇數(shù) 計數(shù)=奇數(shù) 計數(shù)+ 1 = > 0 + 1 = 1
第三次迭代:對于范圍(0，4)中的 2–條件為真 如果(NumList[2] % 2 == 0) = >如果(5% 2 = = 0)–條件為假并進入否則塊。 奇數(shù)計數(shù)= 1 + 1 = 2
第四次迭代:對于范圍(0，4)中的 3–如果(7 % 2 == 0)條件為真【T0)–條件為假并進入否則塊。 奇數(shù)計數(shù)= 2 + 1 = 3
第五次迭代:對于范圍(4)中的 4–條件為假。因此，它從 For Loop 退出
Python 程序使用 While 循環(huán)計算列表中的偶數(shù)和奇數(shù)
這個計算偶數(shù)和奇數(shù)的 Python 程序與上面的相同。我們剛剛將 Python For Loop 替換為 While loop 。
NumList = []
Even_count = 0
Odd_count = 0
j = 0
Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
value = int(input("Please enter the Value of %d Element : " %i))
NumList.append(value)
while(j < Number):
if(NumList[j] % 2 == 0):
Even_count = Even_count + 1
else:
Odd_count = Odd_count + 1
j = j + 1
print("\nTotal Number of Even Numbers in this List = ", Even_count)
print("Total Number of Odd Numbers in this List = ", Odd_count)Please enter the Total Number of List Elements: 5
Please enter the Value of 1 Element : 12
Please enter the Value of 2 Element : 13
Please enter the Value of 3 Element : 14
Please enter the Value of 4 Element : 15
Please enter the Value of 5 Element : 44
Total Number of Even Numbers in this List = 3
Total Number of Odd Numbers in this List = 2使用函數(shù)計算列表中偶數(shù)和奇數(shù)的 Python 程序
這個計數(shù)偶數(shù)和奇數(shù)列表的程序與第一個例子相同。但是，我們使用函數(shù)來分離邏輯
def count_even(NumList):
Even_count = 0
for j in range(Number):
if(NumList[j] % 2 == 0):
Even_count = Even_count + 1
return Even_count
def count_odd(NumList):
Odd_count = 0
for j in range(Number):
if(NumList[j] % 2 != 0):
Odd_count = Odd_count + 1
return Odd_count
NumList = []
Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
value = int(input("Please enter the Value of %d Element : " %i))
NumList.append(value)
even_cnt = count_even(NumList)
odd_cnt = count_odd(NumList)
print("\nTotal Number of Even Numbers in this List = ", even_cnt)
print("Total Number of Odd Numbers in this List = ", odd_cnt)Please enter the Total Number of List Elements: 6
Please enter the Value of 1 Element : 12
Please enter the Value of 2 Element : 22
Please enter the Value of 3 Element : 33
Please enter the Value of 4 Element : 44
Please enter the Value of 5 Element : 55
Please enter the Value of 6 Element : 66
Total Number of Even Numbers in this List = 4
Total Number of Odd Numbers in this List = 2本文標題：Python程序：統(tǒng)計列表中偶數(shù)和奇數(shù)
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