radio button validation in jquery

<input class="attrInputs" type="radio" name="chest" value="A">
<input class="attrInputs" type="radio" name="chest" value="B">
<input class="attrInputs" type="radio" name="chest" value="C">
   
    radio button validation in jquery


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if($('input[name=chest]:checked').length<=0)
{
 alert("No radio checked")
}

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demo