c size_t

#include <stdio.h>

size_t getStringLength(const char* str) {
    size_t length = 0;
    while (str[length] != '\0') {
        length++;
    }
    return length;
}

int main() {
    const char* myString = "Hello, World!";
    size_t length = getStringLength(myString);

    printf("Length of the string: %zu\n", length);

    return 0;
}