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ToLOWER In C++

The C++, you can convert a string to lowercase using the Standard Library’s tolower function from the <cctype> header. You can apply this function to each character in the string to change it to lowercase. Here’s how to do it:

C++
#include <iostream>
#include <string>
#include <cctype> // Include the header for the tolower function

int main() {
    std::string originalString = "Hello World";

    // Convert each character in the string to lowercase
    for (char& c : originalString) {
        c = std::tolower(c);
    }

    std::cout << "Original string: Hello World" << std::endl;
    std::cout << "Lowercase string: " << originalString << std::endl;

    return 0;
}

In this example:

  • We include the <cctype> header to access the tolower function.
  • We define a string named originalString that contains the text you want to convert to lowercase.
  • We use a for loop to iterate through each character in the string.
  • Inside the loop, we apply std::tolower(c) to each character c, which converts it to lowercase. We use the std::tolower function to ensure proper handling of characters that may have uppercase representations in the current locale.

After running this code, the originalString will contain the lowercase version of the input string, and it will be printed as “hello world.”

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