diff --git a/countOfDigitsInaNumber.cpp b/countOfDigitsInaNumber.cpp
new file mode 100644
index 0000000..b98ab84
--- /dev/null
+++ b/countOfDigitsInaNumber.cpp
@@ -0,0 +1,10 @@
+#include <iostream>
+#include<cmath>
+using namespace std;
+int main() {
+    int n;
+    cin>>n;
+    int k = log10(n)+1;
+    cout<<k;
+}
+//following method only requires O(1) time complexity