# question

viwanshu vaibhaw
question
1 Answer(s)      6 years and 10 months ago
Posted in : JavaScript Questions

write a menu driven program to accept a number belonging to any number system that is octal,binary,decimal,hexadecimal according to user's choice and display its equivalent number system entered according to the user's choice

December 2, 2010 at 4:27 PM

Hi Friend,

Try the following code:

```<html>
<script>
function getNumber(){
var num=document.getElementById('num').value;
var type=document.getElementById('type').value;
var sel=window.prompt("Select Number System:\n1 for Octal\n2 for Binary\n3 for Decimal\n4 for Hexadeciaml");
sel=parseInt(sel);
switch(sel){
case 1:
if(type=="decimal"){
num=parseInt(num);
var octal = num.toString(8);
}
else if(type=="octal"){
}
var number=parseInt(num,16);

}
else if(type=="binary"){
var number=parseInt(num,2);
}
break;

case 2:
if(type=="decimal"){
num=parseInt(num);
var binary = num.toString(2);
}
else if(type=="octal"){
var number=parseInt(num,8);
}
var number=parseInt(num,16);
}
else if(type=="binary"){
}
break;

case 3:
if(type=="decimal"){
}
else if(type=="octal"){
var number=parseInt(num,8);
}
var number=parseInt(num,16);
}
else if(type=="binary"){
var number=parseInt(num,2);
}
break;

case 4:
if(type=="decimal"){
num=parseInt(num);
}
else if(type=="octal"){
var number=parseInt(num,8);
}
}
else if(type=="binary"){
var number=parseInt(num,2);
}
break;
default:
}
}
</script>
Enter Number <input type="text" id="num"><br><br>
<input type="button" onclick="getNumber();" value="Get">
</html>
```

Thanks

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