diff --git a/C++/modular_exponentiation.cpp b/C++/modular_exponentiation.cpp
new file mode 100644
index 0000000..bf4a78c
--- /dev/null
+++ b/C++/modular_exponentiation.cpp
@@ -0,0 +1,27 @@
+#include<bits/stdc++.h>
+using namespace std;
+#define ll long long int
+ll mod=1e9+7;
+ll solve(ll a,ll b)
+{
+    if(b==0)
+        return 1;
+    a=a%mod;
+    ll res=(solve(a,b/2)%mod);
+    res=(res*res)%mod;
+    if(b%2!=0)
+    res*=a;
+    return res%mod;
+}
+int main()
+{
+    int t;
+    cin>>t;
+    //cout<<mod<<"\n";
+    while(t--)
+    {
+        ll a,b;
+        cin>>a>>b;
+        cout<<solve(a,b)<<"\n";
+    }
+}