$toPrecision

Update records by setting the value of a numeric column to a number with a specified total number of significant digits. The $toPrecision method is used to round the value to the specified precision, ensuring a consistent number of significant figures. For example, if the column value is 123.456 and you use $toPrecision: 4, it will be rounded to 123.5. This is useful when you want to maintain a specific level of precision in your data, such as for measurements or scientific calculations.

await Member.$update({
    $where: { 
        age: { 
            $eq: 16 
        } 
    },
    $update: {
        $toPrecision: {
          age: 4
        }
    }
});