What does the percent sign mean in js

The percent sign (%) in JavaScript is used for: modulo operation, calculation of division remainder, string formatting, use of %s placeholder to insert string DOM selector, use % to match any element

Why is the percent sign (%) in JavaScript

In JavaScript, the percent sign (%) symbol is For the following purposes:

Modulo operation

• % operator calculates the remainder when dividing two numbers, for example:

  • 5 % 2 Returns 1 because the remainder of 5 divided by 2 is 1.

String formatting

• In template strings, the % symbol is used for formatting characters string. For example:

  • "Hello, %s!" You can use string interpolation to fill %s.

DOM Selector

• In CSS selectors, the % symbol is used to match any element, For example:

  • % p matches all <p></p> elements in the page.

More uses

• ##Type checking: %# The ## symbol can be used with the typeof operator to check the type of a variable. For example:

  typeof 5 % 2
  • returns "number" because the modulo operation produces numbers.
• JSON Conversion: The

  % notation can be used with the JSON.parse method to convert JSON String converted to JavaScript object. For example:

  JSON.parse("{\"name\": \"John\"} %")
  • Convert a JSON string to an object.

Note: The

% symbol is not an arithmetic operator in JavaScript, but is used for the specific purpose described above.

The above is the detailed content of What does the percent sign mean in js. For more information, please follow other related articles on the PHP Chinese website!