Javascript compare two numbers

November 7th, 2008 admin

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How to compare two Value in JavaScipts:

1.Get the Value From Html Page using getElementById

2.Compare by Using parseInt For Interger Value and parseFloat For Float Value

3.compare two value as

var first=document.getElementById('first').value;
var second=document.getElementById('second').value; 
 
if(parseInt(first)<parseInt(second))
alert('Second Value is Greater than first');
 
else if(parseInt(first)>parseInt(second))
alert('First Value is Greater than second');
 
else if(parseInt(first)==parseInt(second))
alert('First Value and second value is equal');

4.Include the code in Html Page For TextBox

First Value:<input type="text" value="0" onkeyup="compare();" name="first" id="first">
Second Value:<input type="text" value="0" onkeyup="compare();" name="second" id="second">

Demo Link

Popularity: 41% [?]

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Posted in Javascript Tags: compare, Javascript

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4 Responses to “Javascript compare two numbers”

1. Justin says:

   August 15, 2010 at 6:45 pm

   How to compare not equal to in java script?
2. Rui says:

   August 16, 2011 at 6:47 pm

   How can I compare String value?
3. Ravan says:

   September 13, 2011 at 6:47 pm

   Thank you very much… Instead of the above code..
   I changed the code below…..

   if(parseInt(first)< parseInt(second))
   {
   alert('Second Value is Greater than first');
   textfirst.focus();
   }
4. Raf says:

   October 18, 2011 at 6:15 am

   Im doing a similar thing but I want to have multiple comparisons but use the one javascript. at the moment the first set works perfectly but nothing after that. I could call the next set third and forth value etc but that would mean duplicating the javascript. is there a way around this?