What is precision in JS?
precision Optional. An integer specifying the number of significant digits.
What is difference between toFixed and toPrecision?
Difference is toFixed() count starts after decimal point but toPrecision() count starts before decimal point. Compare value of variable b and b1. Case 3. In this case parameter value(10) exceeds no. of digits after the decimal point so adding extra “0” to make it precise.
What is number Epsilon?
The Number. EPSILON property represents the difference between 1 and the smallest floating point number greater than 1.
isNaN() method determines whether a value is NaN (Not-A-Number). This method returns true if the value is of the type Number, and equates to NaN. Otherwise it returns false. … isNaN() does not convert the values to a Number, and will not return true for any value that is not of the type Number.
toFixed() returns a string representation of numObj that does not use exponential notation and has exactly digits digits after the decimal place. The number is rounded if necessary, and the fractional part is padded with zeros if necessary so that it has the specified length.
The Math. round() method rounds a number to the nearest integer. Note: 2.49 will be rounded down (2), and 2.5 will be rounded up (3).
How do I use toFixed?
Is toFixed reliable?
NaN is a property of the global object. In other words, it is a variable in global scope. The initial value of NaN is Not-A-Number — the same as the value of Number. … There are five different types of operations that return NaN : Number cannot be parsed (e.g. parseInt(“blabla”) or Number(undefined) )