Improved sqrt

Author: javadev

Calc.html

@@ -1074,7 +1074,7 @@ <h2 class="history-title">
                     <!-- Row 2 -->
                     <button class="btn function" onclick="appendFunction('1/')">1/x</button>
                     <button class="btn function" onclick="appendOperator('^2')">x²</button>
-                    <button class="btn function" onclick="appendFunction('sqrt(')">√x</button>
+                    <button class="btn function" onclick="appendSqrt()">√x</button>
                     <button class="btn operator" onclick="appendOperator('/')">÷</button>
 
                     <!-- Row 3 -->
@@ -1126,7 +1126,7 @@ <h2 class="history-title">
                     <button class="btn scientific" onclick="appendOperator('mod')">mod</button>
 
                     <!-- Row 3 -->
-                    <button class="btn scientific" onclick="appendFunction('sqrt(')">²√x</button>
+                    <button class="btn scientific" onclick="appendSqrt()">²√x</button>
                     <button class="btn operator" onclick="appendOperator('(')">(</button>
                     <button class="btn operator" onclick="appendOperator(')')">)</button>
                     <button class="btn scientific" onclick="appendOperator('!')">n!</button>
@@ -1314,6 +1314,24 @@ <h2 class="history-title">
             updateDisplay();
         }
 
+        function appendSqrt() {
+            if (justCalculated) {
+                expression = '';
+                justCalculated = false;
+            }
+            
+            // Check if there's a current value to apply sqrt to
+            if (expression && !expression.match(/[\+\-\*\/\^\(]$/)) {
+                // If expression ends with a number, wrap it in sqrt
+                expression = 'sqrt(' + expression + ')';
+            } else {
+                // Otherwise just add sqrt( for new input
+                expression += 'sqrt(';
+            }
+            
+            updateDisplay();
+        }
+
         function appendFunction(func) {
             if (justCalculated) {
                 expression = '';