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