How to comapre a variable value with four zero in javascript

Question

I'm trying to compare two variables values, but it is not working as expected, I need to compare a static id (0000) four zero's with what has been entered by user(userInput), I tried to print values but it prints only first zero and skips rest, also it compare user value with only first zero, I need to compare user entered value with exact four zeros Any idea what is wrong?

function showProfile() {
 var checkEmpId= document.getElementById("emp_id").value;
    var staticEmpId=0000; 
    console.log(+checkEmpId); // from user Input
    console.log(+staticEmpId); // shows only one 0
    setTimeout(function(){
 //    I thought this will help ,still not working
        if(parseInt(checkEmpId,4)== parseInt(staticEmpId,4)){
        
// I tried below as if statement but no luck
//if((document.getElementById("emp_id").value)="0000"){
console.log("Yay, Got luck"); }
        else
        {
             console.log("else block is now clalled");
        errorProfileId();
        }
    },4000)
}

<label>INCR</label><input type="text" class="form-control" name="otp" id="emp_id" required size="4" maxlength="4">
  <button type="submit" class="btn btn-default btn-success" tabindex="-1" id="register_emp_btn"  dismiss="modal" onclick="showProfile();">Compare</button>

 funcion showProfile(){
 var checkEmpId= document.getElementById("emp_id").value;
    var staticEmpId=1234;
    console.log(+checkEmpId);
    console.log(+staticEmpId);
    setTimeout(function(){
        if(parseInt(checkEmpId,4)== parseInt(staticEmpId,4)){
        
//        if((document.getElementById("emp_id").value)="0000"){
           var checkID=document.getElementById("emp_id").value;
         localStorage.setItem("LSEmpId",document.getElementById("emp_id").value);
            window.location.replace("signup_step2.html");
          
        }
        else
        {
             console.log("else block is now clalled");
        ErrorProfile();
        }
    },4000)
}

Instead of doing number type comparison, try doing string type comparison. As, 0000 in number is equivalent to 0 value. — Hassan Imam, Feb 13 '18 at 10:30
`0000` is an INT `"0000"` would be a string. Integer will always be compared by it's value, never digit by digit — user3154108, Feb 13 '18 at 10:31
You are trying to compare an integer and a string input. Try this, convert staticEmpId to string containing 4 zeros `var staticEmpId="0000"; if(checkEmpId === staticEmpId) { // do something cause its true }` — CodeLover, Feb 13 '18 at 10:33
@NinaScholz that is as per https://stackoverflow.com/questions/9094299/issue-with-comparing-two-numbers-in-javascript — Prasad_Joshi, Feb 13 '18 at 10:46

score 0 · Answer 1 · answered Feb 13 '18 at 10:31

0

In javascript (i would even say most programming languages) leading 0s on integers are being ignored, so that is the reason you are getting only a single 0. A simple workaround would be to use a string as "0000" to do your comparison. Hope this helps!

answered Feb 13 '18 at 10:31

N. Ivanov

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score 0 · Answer 2 · answered Feb 13 '18 at 10:44

function showProfile() {
 var checkEmpId= document.getElementById("emp_id").value;
    var staticEmpId="0000"; 
    document.write("<br>"+checkEmpId); // from user Input
    document.write("<br>"+staticEmpId); // shows only one 0
    setTimeout(function()
    {
        if(checkEmpId===staticEmpId){
            document.write("<br>Yay, Got luck"); 
        }else{
            document.write("<br>else block is now called");
        }
    },4000)
}

<label>INCR</label><input type="text" class="form-control" name="otp" id="emp_id" required size="4" maxlength="4">
  <button type="submit" class="btn btn-default btn-success" tabindex="-1" id="register_emp_btn"  dismiss="modal" onclick="showProfile();">Compare</button>

How to comapre a variable value with four zero in javascript

2 Answers2