Add Four Numbers from an HTML Form (and Display the Results) : Number Data Type « Language Basics « JavaScript DHTML

Add Four Numbers from an HTML Form (and Display the Results)

<TITLE>Add all of the numbers </TITLE>
   function addNums () { 
      var theAnswer = 0; 
      for (var i = 0; i < addNums.arguments.length; i++) { 
         var theNum = Number(addNums.arguments[i]); 
         theAnswer += theNum; 
      return theAnswer; 
<FORM Name="theForm">
<TABLE cellspacing=5>
<INPUT Type=Text Name="num1">
<INPUT Type=Text Name="num2">
<INPUT Type=Text Name="num3">
<TD align=right>
<INPUT Type=Button Value="Add Them" onClick='document.write("The sum of the numbers is " + 
addThreeNums(theForm.num1.value,theForm.num2.value,theForm.num3.value, theForm.num4.value));'>

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