first commit

apps/kconfig_hello/src/main.c

@@ -0,0 +1,15 @@
+#include <zephyr/kernel.h>
+#include <zephyr/sys/printk.h>
+
+int main(void) {
+
+	printk("Hello World from Zephyr! %s\n", CONFIG_BOARD_TARGET);
+
+	if (IS_ENABLED(CONFIG_LOG)) {
+		printk("Logging is enabled (level=%d)\n", CONFIG_LOG_DEFAULT_LEVEL);
+	} else {
+		printk("Logging is disabled\n");
+	}
+
+	return 0;
+}