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    <p>Check it using Number conversion:</p> <pre><code> !isNaN(Number([value])); // e.g. isNumber = !isNaN(Number('.3421')); //=&gt; true isNumber = !isNaN(Number('nonumber.3421')); //=&gt; false isNumber = !isNaN(Number('1500032')); //=&gt; true // you can also just use the conversion isNumber = Number('.3421'); //=&gt; 0.3421 isNumber = Number('nonumer.3421'); //=&gt; NaN if (!isNumber) { /*...*/ } // a hidden goodie: Number automatically trims the parameter isNumber = Number(' .3421 '); //=&gt; 0.3421 isNumber = Number(' .3421 \n'); //=&gt; 0.3421 </code></pre> <p>Applied to your function: </p> <pre><code>function isNumeric(prodFilterValue,thousandsDelim) { prodFilterValue = Number(prodFilterValue); return prodFilterValue ? (alert('yeah!'), prodFilterValue) : (alert('no sir'), false); } </code></pre> <p>Furthermore <code>isNaN([value])</code> applies an implicit Number conversion for <code>[value]</code>, so you can use that too.</p> <p>Keep in mind that <code>Number('')</code>, <code>Number(null)</code> or <code>Number('\t\n ')</code> all evaluate to 0 and <code>Number(true)</code> evaluates to 1. So, to be complete you'll have to do extra checks. Something like:</p> <pre><code>function isNumeric(prodFilterValue) { prodFilterValue = prodFilterValue &amp;&amp; /stri/i.test(typeof prodFilterValue) &amp;&amp; prodFilterValue.replace(/^\s+|\s+$/,'').length ? Number(prodFilterValue) : undefined; return prodFilterValue &amp;&amp; prodFilterValue !== 0 ? (alert('yeah!'), prodFilterValue) : (alert('no sir'), false); } </code></pre>
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    1. POnumeric and float validation not success
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    1. PTAnswer
    1. USKooiInc
    1. USKooiInc
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. This table or related slice is empty.
      1. VTUpMod
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      1. VTUpMod
    1. COThat will return true for `true` though, and false for `0`
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      1. USJoakim Johansson
    2. CO@Joakim: yep, edited the answer accordingly
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      1. USKooiInc
    3. COthis is good but when the value is 0.. it is false.. and when I changed to === 0 it is not functioning accordingly
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      1. USct_anas
 

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