Python 程序：计算字符串中的字符出现次数

写一个 Python 程序来计算字符串中的字符的出现次数，并给出一个实例。这个 python 程序允许您输入字符串和字符。

# 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)

这里，我们使用 For Loop 来迭代一个字符串中的每个字符。在 Python For Loop 中，我们使用 If 语句来检查字符串中的任何字符是否等于给定的字符。如果为真，则计数=计数+ 1。

字符串=教程网关 ch = t 计数= 0

对于循环第一次迭代:对于范围(11)中的 I，如果(字符串[i] == char) 如果(t = = t)–条件为真。 计数= 0 + 1 = > 1

第二次迭代:如果(u = = l)–条件为假，范围(11) 中的 1。

第三次迭代:对于范围(11)中的 2，如果(字符串[2] == char) = >如果(t = = t)–条件为真。 计数= 1 + 1 = > 2

对剩余的程序迭代进行同样的操作

计算字符出现次数的 Python 程序示例 2

这个 Python 计算字符串程序中一个字符的总出现次数与上面相同。然而，我们只是将 For 循环替换为 While 循环。

# 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)

字符串输出中 python 字符的出现

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

计算字符总出现次数的 Python 程序示例 3

给定字符程序的 Python 总出现次数与第一个示例相同。但是，这一次，我们使用了函数的概念来分离逻辑。

# 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)

字符串输出中 python 字符的出现

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