Conditional - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

A condition is a set of rules that can interrupt normal code execution or change it, depending on whether the condition is completed or not.

An instruction or a set of instructions is executed if a specific condition is fulfilled. Otherwise, another instruction is executed. It is also possible to repeat the execution of an instruction, or set of instructions, while a condition is not yet fulfilled.

Learn more

General knowledge

• Condition on Wikipedia
• Control flow on MDN

Learn about it

• Making decisions in your code — conditionals
• Control flow and error handling in JavaScript on MDN