The Number class
Syntax
var my_number = new Number(value)
Number Properties:
| S.No. | Property & Description |
|---|---|
| 1. |
MAX_VALUE The largest possible value a number in TypeScript can have 1.7976931348623157E+308. |
| 2. |
MIN_VALUE The smallest possible value a number in TypeScript can have 5E-324. |
| 3. |
NaN Equal to a value that is not a number. |
| 4. |
NEGATIVE_INFINITY A value that is less than MIN_VALUE. |
| 5. |
POSITIVE_INFINITY A value that is greater than MAX_VALUE. |
| 6. |
prototype A static property of the Number object. Use the prototype property to assign new properties and methods to the Number object in the current document. |
| 7. |
constructor Returns the function that created this object’s instance. By default, this is the Number object. |
Number Methods
toExponential(): Forces a number to display in exponential notation as a string , even if the number is in the range in which JavaScript normally uses standard notation.
Syntax
number.toExponential( [fractionDigits] )
fractionDigits − An integer specifying the number of digits after the decimal point, must be between 0 and 100. Defaults to as many digits as necessary to specify the number.
Return Value:
A string representing a Number object in exponential notation with one digit before the decimal point, rounded to fractionDigits digits after the decimal point.
Example:
var number = 1986.0717 var e1 = number.toExponential() var e2 = number.toExponential(1) var e3 = number.toExponential(0) console.log(e1) //1.9860717e+3 console.log(e2) //2.0e+3 console.log(e3) //2e+3
toFixed(): Formats a number with a specific number of digits to the right of the decimal.
Syntax
number.toFixed( [digits] )
digits − The number of digits to appear after the decimal point, must be between 0 and 100. Default value is 0.
Return Value
A string representation of number that does not use exponential notation and has the exact number of digits after the decimal place.
Example:
var number = 1986.0717 var e1 = number.toFixed() var e2 = number.toFixed(1) console.log(e1) //1986 console.log(e2) //1986.1
toLocaleString(): Returns a string value version of the current number in a format that may vary according to a browser’s local settings.
Syntax
number.toLocaleString()
Return Value
Returns a human readable string representing the number using the locale of the environment.
Example:
var number = 1986.0717 var e1 = number.toLocaleString() console.log(e1) //1,986.072
toPrecision(): Defines how many total digits (including digits to the left and right of the decimal) to display of a number. A negative precision will throw an error.
Syntax
number.toPrecision( [ precision ] )
precision − An integer specifying the number of significant digits, must be between 0 and 100.
Return Value
Returns a string representing a Number object in fixed-point or exponential notation rounded to precision significant digits.
Example:
var number = 1986.0717 var e1 = number.toPrecision() var e2 = number.toPrecision(3) console.log(e1) //1986.07 console.log(e2) //1.99e+3
toString(): Returns the string representation of the number’s value. The function is passed the radix, an integer between 2 and 36 specifying the base to use for representing numeric values.
Syntax
number.toString( [radix] )
radix − An integer between 2 and 36 specifying the base to use for representing numeric values.
Return Value:
Returns a string representing the specified Number object, must be between 2 and 36 .
Example:
var number = 1986 var e1 =number.toString() var e2 =number.toString(16) console.log(e1) //1986 console.log(e2) //7c2
valueOf(): Returns the number’s primitive value.
Syntax
number.valueOf()
Return Value
Returns the primitive value of the specified number object.
Example:
var num = new Number("1e2")
var v1 = num.valueOf()
console.log(num) //100
