Python 程序：計算字符串中的字符出現次數

寫一個 Python 程序來計算字符串中的字符的出現次數，並給出一個實例。這個 python 程序允許您輸入字符串和字符。

# Python Program to Count Occurrence of a Character in a String

string = input("Please enter your own String : ")
char = input("Please enter your own Character : ")

count = 0
for i in range(len(string)):
    if(string[i] == char):
        count = count + 1

print("The total Number of Times ", char, " has Occurred = " , count)

這裡，我們使用 For Loop 來迭代一個字符串中的每個字符。在 Python For Loop 中，我們使用 If 語句來檢查字符串中的任何字符是否等於給定的字符。如果為真，則計數=計數+ 1。

字符串=教程網關
ch = t
計數= 0

對於循環第一次迭代:對於範圍(11)中的 I，如果(字符串[i] == char)
如果(t = = t)–條件為真。
計數= 0 + 1 = > 1

第二次迭代:如果(u = = l)–條件為假，範圍(11)
中的 1。

第三次迭代:對於範圍(11)中的 2，如果(字符串[2] == char) = >如果(t = = t)–條件為真。
計數= 1 + 1 = > 2

對剩餘的程序迭代進行同樣的操作

計算字符出現次數的 Python 程序示例 2

這個 Python 計算字符串程序中一個字符的總出現次數與上面相同。然而，我們只是將 For 循環替換為 While 循環。

# Python Program to Count Occurrence of a Character in a String

string = input("Please enter your own String : ")
char = input("Please enter your own Character : ")
i = 0
count = 0

while(i < len(string)):
    if(string[i] == char):
        count = count + 1
    i = i + 1

print("The total Number of Times ", char, " has Occurred = " , count)

字符串輸出中 python 字符的出現

Please enter your own String : python programs
Please enter your own Character : p
The total Number of Times  p  has Occurred =  2
>>> 
Please enter your own String : hello
Please enter your own Character : l
The total Number of Times  l  has Occurred =  2

計算字符總出現次數的 Python 程序示例 3

給定字符程序的 Python 總出現次數與第一個示例相同。但是，這一次，我們使用了函數的概念來分離邏輯。

# Python Program to Count Occurrence of a Character in a String

def count_Occurrence(ch, str1):
    count = 0
    for i in range(len(string)):
        if(string[i] == char):
            count = count + 1
    return count

string = input("Please enter your own String : ")
char = input("Please enter your own Character : ")

cnt = count_Occurrence(char, string)
print("The total Number of Times ", char, " has Occurred = " , cnt)

字符串輸出中 python 字符的出現

Please enter your own String : Python tutorial
Please enter your own Character : t
The total Number of Times  t  has Occurred =  3
>>> 
Please enter your own String : hi
Please enter your own Character : g
The total Number of Times  g  has Occurred =  0