if statement always return true even for simple integer values

问题

i facing issue my If statement returning always true, for each value.

 var radioValue = parseInt($("input[name=packageRadio]:checked").val())
            alert(radioValue); // 1000, 500, -1



            if ((radioValue) == -1);
            {
                alert("no");

            }

for every value alert("no") is always calling.

回答1:

Remove semicolon after if

if ((radioValue) == -1){
   alert("no");

}

回答2:

Remove semicolon ; after if.And also remove braces () rounded around radioValue. Like following

if (radioValue == -1){
   alert("no");

}

回答3:

When JavaScript parsing, semicolon means the end of the statement (or line). By that code you separate if statement and it's body.

来源：https://stackoverflow.com/questions/61556125/if-statement-always-return-true-even-for-simple-integer-values