Loops execute code blocks multiple times with different values. JavaScript supports for, for/in, for/of, while, and do/while loops. Loops are useful for repetitive array operations
Variables store and reference data throughout Python projects. Variables are created when assigned a value using the = operator. Variable names must start with letter or underscore. Variable names should use snake case (lowercase letters with underscores)
Variables are named storage for data in JavaScript applications. Variables are created using the let keyword. Variables can store data like goods, visitors, and messages
Nullable value type T? represents all values of underlying type T plus null. Nullable type is an instance of System.Nullable<T> structure. Underlying type T cannot be nullable value type itself
Variables store values like numbers, strings, and objects in Roblox Studio. Variables can be declared with names and optional initial values. Local keyword restricts variable visibility to current script. Variable names should start with lowercase letter and use camelCase
Error occurs when accessing undefined or undeclared variables or functions. Variable names must be spelled correctly, case-sensitive. Strings need to be wrapped in quotes. Built-in modules must be imported before use. Dictionary keys need to be wrapped in quotes