Like JavaScript, all the numbers in TypeScript are stored as floating-point values. These numeric values are treated like a number data type. The number is used to represents both integers as well as floating-point values. The number type converts the numeric literal to an instance of the number class. The number class acts as a wrapper and manipulate the numeric literals as they were objects. TypeScript also supports Binary(Base 2), Octal(Base 8), Decimal(Base 10), and Hexadecimal(Base 16) literals.
let identifier: number = value;
let first: number = 12.0; // number let second: number = 0x37CF; // hexadecimal let third: number = 0o377 ; // octal let fourth: number = 0b111001; // binary console.log(first); // 123 console.log(second); // 14287 console.log(third); // 255 console.log(fourth); // 57
The Number objects have the following set of properties:
| SN | Property_Name | Description |
|---|---|---|
| 1. | MAX_VALUE | It returns the largest possible value of a number in JavaScript and can have 1.7976931348623157E+308. |
| 2. | MIN_VALUE | It returns the smallest possible value of a number in JavaScript and can have 5E-324. |
| 3. | NEGATIVE_INFINITY | It returns a value that is less than MIN_VALUE. |
| 4. | POSITIVE_INFINITY | It returns a value that is greater than MAX_VALUE. |
| 5. | NaN | When some number calculation is not representable by a valid number, then TypeScript returns a value NaN. It is equal to a value that is not a number. |
| 6. | prototype | It is a static property of the Number object. It is used to assign new properties and methods to the Number object in the current document. |
console.log("Number Properties: ");
console.log("A number variable can hold maximum value: " + Number.MAX_VALUE);
console.log("A number variable can hold minimum value: " + Number.MIN_VALUE);
console.log("Value of Negative Infinity: " + Number.NEGATIVE_INFINITY);
console.log("Value of Positive Infinity:" + Number.POSITIVE_INFINITY);
console.log("Example of NaN: " +Math.sqrt(-5)); // NaNThe list of Number methods with their description is given below.
| SN | Method_Name | Description |
|---|---|---|
| 1. | toExponential() | It is used to return the exponential notation in string format. |
| 2. | toFixed() | It is used to return the fixed-point notation in string format. |
| 3. | toLocaleString() | It is used to convert the number into a local specific representation of the number. |
| 4. | toPrecision() | It is used to return the string representation in exponential or fixed-point to the specified precision. |
| 5. | toString() | It is used to return the string representation of the number in the specified base. |
| 6. | valueOf() | It is used to return the primitive value of the number. |
let myNumber: number = 12345;
let myNumber_1: number = 12.8789;
let myNumber_2: number = 12667.976;
let myNumber_3: number = 12.5779;
let myNumber_4: number = 1234;
let myNumber_5 = new Number(123);
console.log("Number Method: toExponential()");
console.log(myNumber.toExponential());
console.log(myNumber.toExponential(2));
console.log("Number Method: toString()");
console.log(myNumber.toString());
console.log(myNumber.toString(4));
console.log("Number Method: toFixed()");
console.log(myNumber_1.toFixed());
console.log(myNumber_1.toFixed(3));
console.log("Number Method: toLocaleString()");
console.log(myNumber_2.toLocaleString()); // returns in US English
console.log("Number Method: toPrecision()");
console.log(myNumber_3.toPrecision(1));
console.log(myNumber_3.toPrecision(3));
console.log("Number Method: tovalueOf()");
console.log(myNumber_5)
console.log(myNumber_5.valueOf())
console.log(typeof myNumber)
