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An empty argument list in a function definition indicates a function that takes no arguments. An empty argument list in a function declaration indicates that a function may take any number or type of arguments. Thus, int f() { ... } indicates that function f takes no arguments. However, int f(); simply indicates that the number and type of parameters is not known.
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Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more.
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PARAMETER definition: 1. a set of facts or a fixed limit that establishes or limits how something can or must happen or…. Learn more.
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Arguments are names of values passed to a function by a function call. Parameters are the values the function expects to receive. In a function prototype, the parentheses following the function name contain a complete list of the function's parameters and their types.
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The C standard states that, for a function definition, if the declarator includes an identifier list, the types of the parameters shall be declared in a following declaration list. Apparently this makes a difference. extern int max(int a, int b) { return a > b ? a : b; } extern int max(a, b) int a, b; { return a > b ? a : b; }
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Default Parameters. If a function is called with missing arguments (less than declared), the missing values are set to undefined.. Sometimes this is acceptable, but sometimes it is better to assign a default value to the parameter:
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Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more.
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Static array indices in function parameter declarations (C only) Except in certain contexts, an unsubscripted array name (for example, region instead of region[4]) represents a pointer whose value is the address of the first element of the array, provided that the array has previously been declared.An array type in the parameter list of a function is also converted to the corresponding pointer ...
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