JavaScript General Use Full Number Methods and Properties.

JavaScript Usefull Number Methods and Properties. Some usefull number methods of javascript using in the javascript programming.

Number system methods helpfull when developer develop a project which scale large.

TOSTRING

The toString() is a number system method, which is use for returns a number as a string.

Example:

const num = 123;

var result = num.toString();

console.log(result);

// output
123

var result1 = (100+23).toString();

console.log(result1);
//output
123

TOEXPONENTIAL

The toExponential() method use for returns a string, with a number rounded and written using exponential notation.

Example:

const num1 = 9.656;

var result2 = num.toExponential(2);

console.log(result2);

// Output
9.66e+0

TOFIXED

The toFixed() method returns a string, with the number written with a specified number of decimals.

Example:

// TOFIXED Method

const num2 = 9.656;

var result3 = num2.toFixed(0);

console.log(result3);

// Output
10

var result4 = num2.toFixed(2);

console.log(result4);

//output
9.66

TOPRECISION

The toPrecision() method returns a string, with a number written with a specified lengh.

Example:

// TOPRECISION Method

const num3 = 9.656;

var result5 = num3.toPrecision(2);

console.log(result5);

// output
9.7

var result6 = num3.toPrecision(4);

console.log(result6);

//output

9.656

VALUEOF

The valueOf() method returns a number as a number.

Example:

// VALUEOF Method

const num4 = 123;

var result7 = num4.valueOf(4);

console.log(result7);
//output
123

NUMBER

The number() method can be used to convert JavaScript variables to numbers.

Example:

// Number Method

console.log(Number(true));
console.log(Number(false));
console.log(Number(“10”));
console.log(Number(“10.23”));
console.log(Number(“10,23”));
//oputput
1
0
10
10.23
NaN

PARSEINT

The parseInt() method perses a string and return a whole number. Spaces are allowed. Only the first number is returned.

Example:

// ParseInt Method

console.log(parseInt(“10”));
console.log(parseInt(“10.33”));
console.log(parseInt(“10 20 30”));
console.log(parseInt(“10 years”));
console.log(parseInt(“years 10”));

// Output

10
10
10
10
NaN

PARSEFLOAT

The parseFloat() method parses a string and return a number. Spaces are allowed. Only the first number is returned.

Example:

// ParseFloat Method

console.log(parseFloat(“10”));
console.log(parseFloat(“10.33”));
console.log(parseFloat(“10 20 30”));
console.log(parseFloat(“10 years”));
console.log(parseFloat(“years 10”));
// Output
10
10.33
10
10
NaN

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