Example: tolower() String Lowercase Conversion in C

C
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// tolower() String Lowercase Conversion
#include <stdio.h>
#include <string.h> // For strlen (optional, can use null terminator check)
#include <ctype.h>  // For tolower()

int main() {
    char str[] = "AnOtHeR ExAmPlE!"; // Step 1: Initialize the string
    int i = 0;

    printf("Original string: %s\n", str);

    // Step 2: Iterate through the string
    while (str[i] != '\0') {
        // Step 3: Use tolower() to convert the character and assign it back
        str[i] = tolower(str[i]);
        i++; // Move to the next character
    }

    printf("Lowercase string: %s\n", str); // Step 4: Print the modified string

    return 0;
}