From 8fb82e1fb8f8d2a57e9891d54d2c5a169459831b Mon Sep 17 00:00:00 2001
From: Arthur Drobot <drobotarthur@gmail.com>
Date: Thu, 27 Jul 2017 13:47:51 -0700
Subject: [PATCH] Add sqrt function.

---
 src/org/nwapw/abacus/plugin/StandardPlugin.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/org/nwapw/abacus/plugin/StandardPlugin.java b/src/org/nwapw/abacus/plugin/StandardPlugin.java
index 76d7826..8058e49 100755
--- a/src/org/nwapw/abacus/plugin/StandardPlugin.java
+++ b/src/org/nwapw/abacus/plugin/StandardPlugin.java
@@ -220,6 +220,18 @@ public class StandardPlugin extends Plugin {
                 return StandardPlugin.this.getFunction("exp").apply(StandardPlugin.this.getFunction("ln").apply(params[0]).multiply(params[1]));
             }
         });
+
+        registerFunction("sqrt", new Function() {
+            @Override
+            protected boolean matchesParams(NumberInterface[] params) {
+                return params.length == 1;
+            }
+
+            @Override
+            protected NumberInterface applyInternal(NumberInterface[] params) {
+                return StandardPlugin.this.getFunction("pow").apply(params[0], (new NaiveNumber(0.5)));
+            }
+        });
     }
 
     /**