# What Is the Return Data Type of Math RINT?

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Scott Campbell

What Is the Return Data Type of Math RINT?

The `Math.rint()` function is a built-in method in JavaScript that rounds a number to the nearest integer, using the “round half up” algorithm. It returns a value of type number, which is the default data type for numeric values in JavaScript.

## Understanding Math RINT

The `Math.rint()` function works by rounding the given number to the nearest integer. If the decimal part of the number is less than 0.5, it rounds down to the nearest integer; if it is equal to or greater than 0.5, it rounds up to the nearest integer.

### Example:

`Math.rint(4.3)`

• The decimal part (0.3) is less than 0.5, so it rounds down to 4.

Note: The `Math.rint()` function does not modify the original number; instead, it returns a new rounded value.

## Data Type Returned by Math RINT

The return data type of `Math.rint()` is always a number, regardless of the input type provided.

### Example:

`typeof Math.rint(4)`

• The result will be “number” since 4 is already an integer and rounding has no effect.

### Example:

`typeof Math.rint("2")`

• The result will also be “number” since JavaScript automatically converts the string “2” to a number before rounding it.

Note: If the input provided to `Math.rint()` is not a number or cannot be converted to a number, it will return NaN (Not-a-Number).

## Conclusion

The `Math.rint()` function is a useful tool in JavaScript for rounding numbers to the nearest integer. It returns a value of type number, ensuring consistency in data types. Understanding its behavior and return data type is important for accurate calculations and programming logic.