JavaScript Number

Number in JavaScript

The JavaScript Number object represents numerical date, either integers or floating-point numbers. In general, you do not need to worry about Number objects because the browser automatically converts number literals to instances of the number class.

You can direct assign a number to a variable also. For example:

var x=102;//integer value

var y=102.7;//floating point value

var z=13e4;//exponent value, output: 130000

var n=new Number(16);//integer value by number object

Number Constants

Let’s see the list of JavaScript number constants with description.

  • MIN_VALUE : returns the largest minimum value.
  • MAX_VALUE : returns the largest maximum value.
  • POSITIVE_INFINITY : returns positive infinity, overflow value.
  • NEGATIVE_INFINITY : returns negative infinity, overflow value.
  • NaN : represents “Not a Number” value.

Number Methods

Let’s see the list of JavaScript number methods with their description.

  • isFinite() : It determines whether the given value is a finite number.
  • isInteger() : It determines whether the given value is an integer.
  • parseFloat() : It converts the given string into a floating point number.
  • parseInt() : It converts the given string into an integer number.
  • toExponential() : It returns the string that represents exponential notation of the given number.
  • toFixed() : It returns the string that represents a number with exact digits after a decimal point.
  • toPrecision() : It returns the string representing a number of specified precision.
  • toString() : It returns the given number in the form of string.

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