diff --git a/C/armstrong.c b/C/armstrong.c
new file mode 100644
index 0000000..3be251d
--- /dev/null
+++ b/C/armstrong.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+void main() {
+    int n, originalNum, rem, result = 0;
+    printf("Enter a three-digit integer: ");
+    scanf("%d", &n);
+    originalNum = n;
+
+    while (originalNum != 0) {
+       // remainder contains the last digit
+        rem = originalNum % 10;
+        
+       result += rem * rem * rem;
+        
+       // removing last digit from the orignal number
+       originalNum /= 10;
+    }
+
+    if (result == n)
+        printf("%d is an Armstrong number.", n);
+    else
+        printf("%d is not an Armstrong number.", n);
+
+}
\ No newline at end of file