how can i get the value of radiobox in jquery

This question already has an answer here:

How can I know which radio button is selected via jQuery? 29 answers

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你应该得到按下复选框的值

var religion = $("input[name=religion]:checked").val();
alert(religion)

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const radio1Value = document.querySelector("input").value;
console.log(radio1Value);

<input type="radio" name="religion" class="chk" name="religion" value="muslim">Muslim
<input type="radio" name="religion" class="chk" name="religion" value="christian">Christian
<input type="radio" name="religion" class="chk" name="religion" value="hindu">Hindu

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try this

$(document).ready(function(){
        $("input[type='button']").click(function(){
            var radioValue = $("input[name='religion']:checked").val();
            if(radioValue){
                alert("Your are a - " + radioValue);
            }
        });

    });

Demo

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