How to convert String to Lowercase in C++ - Step by Step Examples

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How to convert String to Lowercase in C++ ?

Answer

To convert a string to lowercase in C++, you can use the std::transform function with std::tolower.

✐ Examples

1 Convert "Hello World" to Lowercase

In this example,

Create a string variable str with the value "Hello World".
Use std::transform with iterators of str and std::tolower to convert each character to lowercase.
Print str.

C++ Program

#include <iostream>
#include <algorithm>
#include <cctype>

int main() {
    std::string str = "Hello World";
    std::transform(str.begin(), str.end(), str.begin(), ::tolower);
    std::cout << str << std::endl;
    return 0;
}

Output

hello world

2 Convert "C++ Programming" to Lowercase

In this example,

Create a string variable str with the value "C++ Programming".
Use std::transform with iterators of str and std::tolower to convert each character to lowercase.
Print str.

C++ Program

#include <iostream>
#include <algorithm>
#include <cctype>

int main() {
    std::string str = "C++ Programming";
    std::transform(str.begin(), str.end(), str.begin(), ::tolower);
    std::cout << str << std::endl;
    return 0;
}

Output

c++ programming

Summary

In this tutorial, we learned How to convert String to Lowercase in C++ language with well detailed examples.

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How to convert String to Lowercase in C++ - Step by Step Examples

How to convert String to Lowercase in C++ ?

Answer

✐ Examples

1 Convert "Hello World" to Lowercase

C++ Program

Output

2 Convert "C++ Programming" to Lowercase

C++ Program

Output

Summary

More C++ Strings Tutorials