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Arrays count from 0 so colors[0] is the first item.
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Useful for grids or comparing arrays.
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Objects store key-value pairs like {name:"Max",age:12}.
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Functions bundle tasks so you can call them whenever needed.
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Use student.name to read the value of name.
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student["name"] lets you use variables or strings as keys.
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Parameters are variables inside the function definition.
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if statements run code when a condition is true.