diff --git a/src/main/c/sudoku.c b/src/main/c/sudoku.c
new file mode 100644
index 0000000..8e7d480
--- /dev/null
+++ b/src/main/c/sudoku.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+
+#define SIZE 9
+#define EMPTY 0
+#define LEVEL_NUMBER 3
+
+
+int difficulty;
+int selected_level;
+
+
+void startSudoku(); //is instead of main
+
+void startSudoku() {
+    int grid[SIZE][SIZE];
+    selected_level = 0;
+
+    while (1) {
+        printf("\nDifficulty Function - Choose difficulty:\n");
+        printf("1. Easy\n2. Medium\n3. Hard\n");
+        printf("Enter the corresponding number or type 'quit' to exit: ");
+
+        char input[10];
+        scanf("%s", input);
+
+        if (strcmp(input, "quit") == 0) {
+            break;
+        }
+
+        difficulty = input[0] - '0'; // Convert the first character to an integer
+
+        if ((difficulty >= 1 && difficulty <= 3) && input[1] == '\0') {
+            printf("Input is correct");
+        } else {
+            printf("Invalid input. Please enter a number between 1 and 3.\n");
+        }
+        
+    }
+}
+
+int main(){
+    startSudoku();
+    return 0;
+}
\ No newline at end of file