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If it’s less than 0.5, the parameter is rounded to the lowest absolute value integer. The parameter is rounded to the next number in the heading of + if the fractional component is exactly 0.5. Remember that this varies from many languages’ round() methods, which commonly round negative values with a fractional portion of exactly 0.5 to the next integer away from zero, rather than returning a different result.
The integer to which the number should be rounded.
The result of rounding the number that was supplied as an input to the function.
console.log(Math.round(312.3)); console.log(Math.round(834.4)); console.log(Math.round(2.3));
We used the Math class to call the round() function in this example.
console.log(Math.round(-9.1)); console.log(Math.round(-3.2)); console.log(Math.round(-54.6));
However, there are some errors and exceptions that you will have to deal with when it comes to using the Math.round function. They are as follows:-
- A parameter with a non-numeric string returns NaN.
- When more than one integer is supplied as a parameter, the array returns NaN.
- An empty array, variable, or string supplied as a parameter yields NaN.
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