JavaScript Number

Output of the above example

The sum of x and y is 12.56
                                                        

Explanation of the code

• let x = 10;: This line declares a variable named 'x' and assigns integer number value 10.
• let y = 2.56;: This line declares a variable named 'y' and assigns floating-point number value 2.56.
• let sum = x + y;: This line add the values of 'x' and 'y' and assigns the sum to the variable 'sum'.
• console.log("The sum of x and y is " + sum);: In the line, 'console.log()' method prints the 'sum' value in the web console.

Output of the above example

The sum of a and b is 15
The difference of a and b is 5
The product of a and b is 50
The quotient of a and b is 2
                                                        

• Number.parseInt() : This method parses a numeric string and returns an integer (whole number).

  console.log(Number.parseInt('53')); // Output: 53 console.log(Number.parseInt('33.55')); // Output: 33 console.log(Number.parseInt('abc100')); // Output: NaN ( as 'abc100' is not a numeric string)
  

• Number.parseFloat() : This method parses a numeric string and returns a floating-point number.

  console.log(Number.parseFloat('53.21')); // Output: 53.21 console.log(Number.parseFloat('33.55')); // Output: 33.55 console.log(Number.parseFloat('abc100')); // Output: NaN ( as 'abc100' is not a numeric string)
  

• Number.toFixed() : This method converts a number to a string with a fixed number of decimal places.

  let num = 125.235648; console.log(num.toFixed(0)); // Output: '125' console.log(num.toFixed(2)); // Output: '125.24' console.log(num.toFixed(4)); // Output: '125.2356'
  

• Number.toPrecision() : This method formats a number to a specific length (number of digits).

  let newNum = 5.235648; console.log(newNum.toPrecision(2)); // Output: '5.2' (two digits) console.log(newNum.toPrecision(4)); // Output: '5.236' (4 digits) console.log(newNum.toPrecision(6)); // Output: '5.23565' (6 digits)
  

• Number.toString() : This method converts a number to a string with the option of converting to a specific base number (e.g., binary, octal, hexadecimal).

  let myNum = 15; console.log(myNum.toString()); // Output: '15' (string) console.log(myNum.toString(2)); // Output: 1111 (2 for binary) console.log(myNum.toString(8)); // Output: 17 (8 for octal) console.log(myNum.toString(16)); // Output: f (16 for hexadecimal)
  

• Number.valueOf() : This method returns the primitive value of a Number object.

  let numObj = new Number(12.36); console.log(numObj.valueOf()); //Output: 12.36 console.log(typeof numObj.valueOf()); // Output: number
  

• Number.isNaN() : This method determines whether the value is NaN (Not-a-Number). If the value is 'NaN', it returns true otherwise it returns false.

  console.log(Number.isNaN(NaN)); //Output: true console.log(Number.isNaN('Jerry')); //Output: false console.log(Number.isNaN(55)); //Output: false
  

• Number.isFinite() : This method determines whether the value is a finite number.

  console.log(Number.isFinite(555)); //Output: true console.log(Number.isFinite('Jerry')); //Output: false console.log(Number.isFinite('555')); //Output: false
  

• Number.isInteger() : This method determines whether the number is an integer.

  console.log(Number.isInteger(555)); //Output: true console.log(Number.isInteger('Jerry')); //Output: false console.log(Number.isInteger(12.25)); //Output: false
  

• Number.isSafeInteger() : This method determines whether the number is a safe integer (the integer is within the safe range for JavaScript integers).

  console.log(Number.isSafeInteger(555)); //Output: true console.log(Number.isSafeInteger(9007199254740991)); //Output: true console.log(Number.isSafeInteger(90071992547409915)); //Output: false
  

• Number.MAX_VALUE : This represents the largest possible numeric value.

• Number.MIN_VALUE : This represents the smallest possible numeric value.

• Number.POSITIVE_INFINITY : This represents positive infinity.

• Number.NEGATIVE_INFINITY : This represents negative infinity.

• Number.NaN : This represents special NaN "Not-a-Number" value.

• Number.EPSILON : This represents the smallest difference between two representable numbers (the value of the difference between 1 and the smallest floating-point number greater than 1).

• Number.MAX_SAFE_INTEGER : This represents the maximum safe integer in JavaScript.

• Number.MIN_SAFE_INTEGER : This represents the minimum safe integer in JavaScript.

  console.log(Number.MAX_VALUE); //Output: 1.7976931348623157e+308 console.log(Number.MIN_VALUE); //Output: 5e-324 console.log(Number.POSITIVE_INFINITY); //Output: Infinity console.log(Number.NEGATIVE_INFINITY); //Output: -Infinity console.log(Number.NaN); //Output: NaN console.log(Number.EPSILON); //Output: 2.220446049250313e-16 console.log(Number.MAX_SAFE_INTEGER); //Output: 9007199254740991 console.log(Number.MIN_SAFE_INTEGER); //Output: -9007199254740991