In this article, we will convert a float number to a whole number in Javascript. There are various methods to convert float numbers to whole numbers in JavaScript.
- Math.floor() method
- Math.ceil() method
- Math.round() method
- Math.trunc() method
- parseInt() method
- double bitwise not (~~) method
- bitwise OR (|) operator
- Using shift (>>) operator
- unsigned shift (>>>) operator
- By subtracting the fractional part
- XOR (^) operator
We will see these methods one by one now.
Math.floor (floating argument): Round off the number passed as a parameter to its nearest integer in the Downward direction.
Syntax:
Math.floor(value)
Example: In this example, we are using the above-explained method.
javascript
//float value is 4.59;let x = 4.59;let z = Math.floor(x);console.log("Converted value of " + x + " is " + z); |
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)
Example: Here is the basic use of the Math.ceil() method.
javascript
//float value is 4.59;let x = 4.59;let z = Math.ceil(x);console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 4.59 is 5
Math.round (floating argument): Round a number to its nearest integer.
Syntax:
Math.round(var);
Example: Here we are using the above-explained method to convert numbers.
javascript
//float value is 4.59;let x = 4.59;let z = Math.round(x);console.log("Converted value of " + x + " is " + z); |
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)
Example: Here we are using Math.trunc() method to remove the fractional digits.
javascript
//float value is 4.59;let x = 4.59;let z = Math.trunc(x);console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 4.59 is 4
parseInt (floating argument): Accept the string and convert it into an integer.
Syntax:
parseInt(Value, radix)
Example: Here is basic example of above method.
javascript
//float value is 3.54;let x = 3.54;let z = parseInt(x);console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 3.54 is 3
double bitwise not (~~) operator: Round a number to zero. If an operand is a number and it’s not NaN or Infinity.
Syntax:
~~value
Example: Here is the example of a not(~~) operator.
javascript
//float value is 4.59;let x = 4.59;let z = ~~x;console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 4.59 is 4
JavaScript bitwise OR (|) Operator: Round a number towards zero.
Syntax:
let = value | 0;
Example: Here is an example of the above-explained method.
javascript
//float value is 5.67;let x = 5.67;let z = x | 0;console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 5.67 is 5
Using shift (>>) operator: Round a number to towards zero.
Syntax:
let = value >> 0;
Example: Basic example of shift(>>) operator.
javascript
//float value is 5.63;let x = 5.63;let z = x >> 0;//it is same as we are dividing the value by 1.console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 5.63 is 5
Using unsigned shift (>>>) operator Round a number to towards zero.
Syntax:
let = value >>> 0;
Example: Here is an example of the above-explained method.
javascript
//float value is 5.68;let x = 5.68;//it is same as we are dividing the value by 1.let z = x >>> 0;console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 5.68 is 5
By subtracting the fractional part Syntax:
let = val - val%1;
Example: In this example, we are using the above-explained method.
javascript
//float value is 5.48;let x = 5.48;let z = x - x % 1;console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 5.48 is 5
Using XOR (^) operator Syntax:
let = value ^ 0;
Example: Here is the basic use of the XOR(^) operator.
javascript
//float value is 5.49;let x = 5.49;let z = x ^ 0;console.log("Converted value of " + x + " is " + z); |
Output:
Converted value of 5.49 is 5
