diff --git a/math/isInteger.bat b/math/isInteger.bat
index 8fd5c68..6ec5042 100644
--- a/math/isInteger.bat
+++ b/math/isInteger.bat
@@ -1,18 +1,25 @@
-@echo off
+@echo off 
 
-:isInterer  input [returnVar]
-setlocal enableDelayedexpansion
-set "input=%~1"
+:isInterer  input [returnVar] 
+setlocal enableDelayedexpansion 
+set "input=%~1" 
 
-if "!input:~0,1!" equ "-" set "input=!input:~1!"
-
-for %%# in (1 2 3 4 5 6 7 8 9 0) do (
-    set "input=!input:%%#=!"
-)
-
-if "!input!" equ "" (set result=true
+if "!input:~0,1!" equ "-" (
+	set "input=!input:~1!"
 ) else (
- set result=false
+	if "!input:~0,1!" equ "+" set "input=!input:~1!"
 )
 
-endlocal & if "%~2" neq "" (set %~2=%result%) else echo %result%
+for %%# in (1 2 3 4 5 6 7 8 9 0) do ( 
+        if not "!input!" == "" ( 
+                set "input=!input:%%#=!" 
+    )         
+) 
+
+if "!input!" equ "" ( 
+        set result=true 
+) else ( 
+        set result=false 
+) 
+
+endlocal & if "%~2" neq "" (set %~2=%result%) else echo %result%