diff --git a/index.html b/index.html
index dba9f04..3f3d97e 100644
--- a/index.html
+++ b/index.html
@@ -173,6 +173,8 @@ <h1 id="calc-style">Calculator<i class="bx bx-calculator"></i></h1>
                 <button class="button complex-stuff">
                   tanh
                 </button>
+                <button class="button" id="logBtn">
+                  log</button>
               </div>
             </div>
             <button class="solve-quadratic" onclick=" solveQuadratic()">SOLVE EQUATION</button>
diff --git a/script.js b/script.js
index 03eb4ce..71d6bdc 100644
--- a/script.js
+++ b/script.js
@@ -245,6 +245,17 @@ Array.prototype.forEach.call(buttons, function (button) {
     }
   });
 });
+document.getElementById('logBtn').addEventListener('click', log);
+function log() {
+    const num = parseFloat(display.value);
+    if (isNaN(num) || num <= 0) {
+        openToast('error', 'Error', 'Enter a positive number to calculate log');
+        return;
+    }
+    display.value = Math.log10(num);
+    resultDisplayed = true;
+    manageLocalStorage(display.value);
+}
 
 // Prevents multiple decimal points from being typed through keyboard
 function isNumber(num) {