Mastering JavaScript Numbers
February 6, 2024
JavaScript numbers are a fundamental data type used to represent both integer and floating-point values. Understanding how to work with numbers is essential for performing mathematical operations, comparisons, and handling numerical data in web development. JavaScript provides a single Number
type for all numeric values, with the ability to represent integers, floating-point numbers, and special values such as NaN
(Not-a-Number) and Infinity
.
How to work with JavaScript numbers
You can declare a number in JavaScript simply by assigning a value to a variable:
let integerExample = 42; let floatingPointExample = 3.14;
JavaScript also supports scientific notation for very large or very small numbers:
let smallNumber = 1e-5; // Equivalent to 0.00001 let largeNumber = 2e6; // Equivalent to 2000000
Arithmetic operations
JavaScript supports all standard arithmetic operations, including addition, subtraction, multiplication, division, and modulus (remainder):
let sum = 10 + 5; // 15 let difference = 10 - 5; // 5 let product = 10 * 5; // 50 let quotient = 10 / 5; // 2 let remainder = 10 % 3; // 1
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Special numeric values
JavaScript's Number
type includes several special values:
NaN
(Not-a-Number): Represents a computational error or an undefined mathematical result.
let result = 0 / 0; // NaN
Infinity
andInfinity
: Represent values beyond the largest and smallest representable numbers.
let positiveInfinite = 1 / 0; // Infinity let negativeInfinite = -1 / 0; // -Infinity
Checking for number type
To check whether a value is a number, use the typeof
operator or Number.isFinite
for distinguishing real numbers from Infinity
, -Infinity
, and NaN
:
typeof 42; // "number" Number.isFinite(1 / 0); // false
Parsing numbers from strings
To convert a string to a number, use parseInt
, parseFloat
, or the unary +
operator:
parseInt("123"); // 123 parseFloat("10.5"); // 10.5 +"42"; // 42
Understanding and effectively using numbers in JavaScript is crucial for any web development project. Whether you're calculating values, formatting numbers for display, or interpreting numeric input from users, JavaScript's Number
type and its associated methods provide a robust foundation for numerical operations.
TOC
February 6, 2024
JavaScript numbers are a fundamental data type used to represent both integer and floating-point values. Understanding how to work with numbers is essential for performing mathematical operations, comparisons, and handling numerical data in web development. JavaScript provides a single Number
type for all numeric values, with the ability to represent integers, floating-point numbers, and special values such as NaN
(Not-a-Number) and Infinity
.
How to work with JavaScript numbers
You can declare a number in JavaScript simply by assigning a value to a variable:
let integerExample = 42; let floatingPointExample = 3.14;
JavaScript also supports scientific notation for very large or very small numbers:
let smallNumber = 1e-5; // Equivalent to 0.00001 let largeNumber = 2e6; // Equivalent to 2000000
Arithmetic operations
JavaScript supports all standard arithmetic operations, including addition, subtraction, multiplication, division, and modulus (remainder):
let sum = 10 + 5; // 15 let difference = 10 - 5; // 5 let product = 10 * 5; // 50 let quotient = 10 / 5; // 2 let remainder = 10 % 3; // 1
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Special numeric values
JavaScript's Number
type includes several special values:
NaN
(Not-a-Number): Represents a computational error or an undefined mathematical result.
let result = 0 / 0; // NaN
Infinity
andInfinity
: Represent values beyond the largest and smallest representable numbers.
let positiveInfinite = 1 / 0; // Infinity let negativeInfinite = -1 / 0; // -Infinity
Checking for number type
To check whether a value is a number, use the typeof
operator or Number.isFinite
for distinguishing real numbers from Infinity
, -Infinity
, and NaN
:
typeof 42; // "number" Number.isFinite(1 / 0); // false
Parsing numbers from strings
To convert a string to a number, use parseInt
, parseFloat
, or the unary +
operator:
parseInt("123"); // 123 parseFloat("10.5"); // 10.5 +"42"; // 42
Understanding and effectively using numbers in JavaScript is crucial for any web development project. Whether you're calculating values, formatting numbers for display, or interpreting numeric input from users, JavaScript's Number
type and its associated methods provide a robust foundation for numerical operations.
February 6, 2024
JavaScript numbers are a fundamental data type used to represent both integer and floating-point values. Understanding how to work with numbers is essential for performing mathematical operations, comparisons, and handling numerical data in web development. JavaScript provides a single Number
type for all numeric values, with the ability to represent integers, floating-point numbers, and special values such as NaN
(Not-a-Number) and Infinity
.
How to work with JavaScript numbers
You can declare a number in JavaScript simply by assigning a value to a variable:
let integerExample = 42; let floatingPointExample = 3.14;
JavaScript also supports scientific notation for very large or very small numbers:
let smallNumber = 1e-5; // Equivalent to 0.00001 let largeNumber = 2e6; // Equivalent to 2000000
Arithmetic operations
JavaScript supports all standard arithmetic operations, including addition, subtraction, multiplication, division, and modulus (remainder):
let sum = 10 + 5; // 15 let difference = 10 - 5; // 5 let product = 10 * 5; // 50 let quotient = 10 / 5; // 2 let remainder = 10 % 3; // 1
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Special numeric values
JavaScript's Number
type includes several special values:
NaN
(Not-a-Number): Represents a computational error or an undefined mathematical result.
let result = 0 / 0; // NaN
Infinity
andInfinity
: Represent values beyond the largest and smallest representable numbers.
let positiveInfinite = 1 / 0; // Infinity let negativeInfinite = -1 / 0; // -Infinity
Checking for number type
To check whether a value is a number, use the typeof
operator or Number.isFinite
for distinguishing real numbers from Infinity
, -Infinity
, and NaN
:
typeof 42; // "number" Number.isFinite(1 / 0); // false
Parsing numbers from strings
To convert a string to a number, use parseInt
, parseFloat
, or the unary +
operator:
parseInt("123"); // 123 parseFloat("10.5"); // 10.5 +"42"; // 42
Understanding and effectively using numbers in JavaScript is crucial for any web development project. Whether you're calculating values, formatting numbers for display, or interpreting numeric input from users, JavaScript's Number
type and its associated methods provide a robust foundation for numerical operations.
What is Basedash?
What is Basedash?
What is Basedash?
Ship faster, worry less with Basedash
Ship faster, worry less with Basedash
Ship faster, worry less with Basedash
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
Dashboards and charts
Edit data, create records, oversee how your product is running without the need to build or manage custom software.
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