How do you use variables in code in game maker?

In GameMaker, variables are used to store and manipulate data within your game. You can create variables using the assignment operator, such as myVariable = 10;, where myVariable is the name of your variable. Variables can be local (defined within a specific event or script) or global (accessible throughout the game) by using the global. prefix (e.g., global.myVariable). You can then use these variables in conditions, control structures, or to store player scores, health, or other game state information.