How do I efficiently convert a float to an integer in JavaScript?

In JavaScript, there are several methods to convert a float number to an integer without specifying whether you want to truncate or round the number:

• Math.floor(): Truncates the number by removing the decimal part, resulting in the largest integer that is less than or equal to the given float.
• Math.ceil(): Rounds the number up to the nearest integer, resulting in the smallest integer that is greater than or equal to the given float.
• Math.round(): Rounds the number to the nearest integer, away from zero.

To efficiently perform these conversions, use these methods directly. Avoid converting the float to a string and then parsing it back as an integer, as this approach incurs additional overhead.

Additional Notes:

• JavaScript's Math.trunc() method, introduced in ECMAScript 6, specifically truncates the number, which is equivalent to Math.floor() for positive values.
• The bitwise operator ~~ also truncates the number, but it may not be supported in all environments or provide consistent results.
• Operators like | 0, >> 0, and >>> 0 can also be used for truncation, but they may have performance implications.
• The expression value - value % 1 is another approach for truncation, but it is less efficient than Math.floor().

Examples:

Positive Values:

Negative Values:

Note:

The behavior of these functions may vary for very large or very small numbers due to floating-point precision limitations and signed integer limitations.