TypeScript is like JavaScript which supports numerical values as Number objects. The numbers in typescript are used as both integers as well as floating-point values. The number class acts as wrapper and manipulates the numeric literals as they were objects.
Syntax:
var var_name = new Number(value)
Property:
- MAX_VALUE: It has the largest possible value 1.7976931348623157E+308 in JavaScript.
- MIN_VALUE: It has the smallest possible value 5E-324 in JavaScript.
- NaN: This property has Equal to a value that is not a number.
- NEGATIVE_INFINITY: This has a value that is less than MIN_VALUE.
- POSITIVE_INFINITY: This has a value that is greater than MAX_VALUE.
- prototype: This property is used to assign new properties and methods to the Number object.
- constructor: This property will return the function that created this object’s instance
Example:
console.log(" Number Properties in TypeScript: ");Â console.log("Maximum value of a number variable has : "Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â + Number.MAX_VALUE);Â console.log("The least value of a number variable has: "Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â + Number.MIN_VALUE);Â console.log("Value of Negative Infinity: "Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â + Number.NEGATIVE_INFINITY);Â console.log("Value of Negative Infinity:"Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â + Number.POSITIVE_INFINITY); |
Output:
Number Properties in TypeScript: Maximum value of a number variable has: 1.7976931348623157e+308 The least value of a number variable has: 5e-324 Value of Negative Infinity: -Infinity Value of Negative Infinity:Infinity
Example of NaN:
var day = 0Â if( day<=0 || v >7) {Â Â Â Â day = Number.NaNÂ Â Â Â console.log("Day is "+ day)Â } else {Â Â Â Â console.log("Value Accepted..")Â } |
Output:
Month is NaN
Methods:
- toExponential(): This method will return a number to display in exponential notation.
- toFixed(): This method will stable the number to the right of the decimal with a specific number of digits.
- toLocaleString(): This method is used to convert the number into a local specific representation of the number.
- toPrecision(): It will define total digits to the left and right of the decimal to display of a number. It will also show an error when there is negative precision.
- toString(): Used to return the string representation of the number in the specified base.
- valueOf(): This method will return number’s primitive value.
Example 1:
// The toExponential()Â var num1 = 2525.30Â var val = num1.toExponential();Â console.log(val) |
Output:
2.5253e+3
Example 2:
// The toFixed() var num3 = 237.134Â console.log("num3.toFixed() is "+num3.toFixed())Â console.log("num3.toFixed(2) is "+num3.toFixed(3))Â console.log("num3.toFixed(6) is "+num3.toFixed(5)) |
Output:
num3.toFixed() is 237 num3.toFixed(2) is 237.134 num3.toFixed(6) is 237.13400
Example 3:
// The toLocaleString() var num = new Number( 237.1346);Â console.log( num.toLocaleString()); |
Output:
237.1346
Example 4:
// The toPrecision() var num = new Number(5.7645326);Â console.log(num.toPrecision());Â console.log(num.toPrecision(1));Â console.log(num.toPrecision(2)); |
Output:
5.7645326 5 5.7
Example 5:
// The toString() var num = new Number(10);Â console.log(num.toString());Â console.log(num.toString(2));Â console.log(num.toString(8)); |
Output:
10 1010 12
Example 6:
// The valueOf() var num = new Number(20);Â console.log(num.valueOf()); |
Output:
20
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