👉 In programming, a "placeholder" is a variable or constant that is used to represent an unknown value in a program. It is typically represented by an asterisk (
), and it allows programmers to easily express unknown values without having to define them upfront. Placeholder variables are often used when the exact value of a variable cannot be determined at compile time, such as for functions or methods that do not have any parameters or return types.
In programming, placeholders can also be used in conditional statements, where they
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