diff --git a/integer.c b/integer.c
new file mode 100644
index 0000000..92c5007
--- /dev/null
+++ b/integer.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main() {
+  long long n;
+  int count = 0;
+  printf("Enter an integer: ");
+  scanf("%lld", &n);
+ 
+  // iterate at least once, then until n becomes 0
+  // remove last digit from n in each iteration
+  // increase count by 1 in each iteration
+  do {
+    n /= 10;
+    ++count;
+  } while (n != 0);
+
+  printf("Number of digits: %d", count);
+}