How to keep only Alphabets in a String in C++ - Step by Step Examples

How to keep only Alphabets in a String in C++ ?

Answer

To keep only alphabets in a string in C++, you can iterate through the characters of the string and check if each character is alphabetic using the 'isalpha' function.

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

In this example,

We create a string str1 with a value of "Hello123 World".
We iterate through each character of the string.
If the character is alphabetic (using the isalpha function), we append it to a new string result1.
Finally, we print the modified string result1.

C++ Program

#include <iostream>
#include <cctype>
#include <string>

int main() {
    std::string str1 = "Hello123 World";
    std::string result1;

    for (char c : str1) {
        if (std::isalpha(c)) {
            result1 += c;
        }
    }

    std::cout << "Modified string: " << result1 << std::endl;
    return 0;
}

Output

Modified string: HelloWorld

2 Keep Only Alphabets in "apple@banana"

In this example,

We create a string str2 with a value of "apple@banana".
We iterate through each character of the string.
If the character is alphabetic (using the isalpha function), we append it to a new string result2.
Finally, we print the modified string result2.

C++ Program

#include <iostream>
#include <cctype>
#include <string>

int main() {
    std::string str2 = "apple@banana";
    std::string result2;

    for (char c : str2) {
        if (std::isalpha(c)) {
            result2 += c;
        }
    }

    std::cout << "Modified string: " << result2 << std::endl;
    return 0;
}

Output

Modified string: applebanana

Summary

In this tutorial, we learned How to keep only Alphabets in a String in C++ language with well detailed examples.

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How to keep only Alphabets in a String in C++ - Step by Step Examples

How to keep only Alphabets in a String in C++ ?

Answer

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

C++ Program

Output

2 Keep Only Alphabets in "apple@banana"

C++ Program

Output

Summary

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