How to convert a float number to the whole number in JavaScript?

Last Updated : 15 Apr, 2019

There are various methods to convert float number to the whole number in JavaScript.

Math.floor (floating argument): Round off the number passed as parameter to its nearest integer in Downward direction.
Syntax:
```
Math.floor(value)
```
<script>
  //float value is 4.59;
   var x = 4.59;
   var z = Math.floor(x);
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 4.59 is 4
```
Math.ceil (floating argument): Return the smallest integer greater than or equal to a given number.
Syntax:
```
Math.ceil(value)
```
<script>
  //float value is 4.59;
   var x = 4.59;
   var z = Math.ceil(x);
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 4.59 is 5
```
Math.round (floating argument): Round a number to its nearest integer.
Syntax:
```
Math.round(var);
```
<script>
  //float value is 4.59;
   var x = 4.59;
   var z = Math.round(x);
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 4.59 is 5
```
Math.trunc (floating argument): Return the integer part of a floating-point number by removing the fractional digits.
Syntax:
```
Math.trunc(value)
```
<script>
  //float value is 4.59;
   var x = 4.59;
   var z = Math.trunc(x);
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 4.59 is 4
```
parseInt (floating argument): Accept the string and convert it into an integer.
Syntax:
```
parseInt(Value, radix)
```
<script>
  //float value is 3.54;
   var x = 3.54;
   var z = parseInt(x);
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 3.54 is 3
```
double bitwise not (~~) operator: Round a number to towards zero. If the operand is a number and it’s not NaN or Infinity.
Syntax:
```
~~value
```
<script>
  //float value is 4.59;
   var x = 4.59;
   var z = ~~x;
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 4.59 is 4
```
bitwise OR (|) operator: Round a number to towards zero.
Syntax:
```
var = value | 0;
```
<script>
  //float value is 5.67;
   var x = 5.67;
   var z = x | 0;
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 5.67 is 5
```
Using shift (>>) operator: Round a number to towards zero.
Syntax:
```
var = value >> 0;
```
<script>
  //float value is 5.63;
   var x = 5.63;
   var z = x >> 0;
   //it is same as we are dividing the value by 1.
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 5.63 is 5
```
Using unsigned shift (>>>) operator Round a number to towards zero.
Syntax:
```
var = value >>> 0;
```
<script>
  //float value is 5.68;
   var x = 5.68;
   //it is same as we are dividing the value by 1.
   var z = x >>> 0;
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 5.68 is 5
```
By subtracting the fractional part
Syntax:
```
var = val - val%1;
```
<script>
  //float value is 5.48;
   var x = 5.48;
   var z = x - x%1;
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 5.48 is 5
```
Using XOR (^) operator
Syntax:
```
var = value ^ 0;
```
<script>
  //float value is 5.49;
   var x = 5.49;
   var z = x ^ 0;
   document.write("Converted value of " + x + " is " + z);
</script>
Output :
```
Converted value of 5.49 is 5
```

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