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C Language > Learn C Language > What is the purpose of 'const' in function parameters?
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What is the purpose of 'const' in function parameters?

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You can use pointers to constant data as function parameters to prevent the function from modifying a parameter passed through a pointer. For objects that are declared as const , you can only call constant member functions. The compiler ensures that the constant object is never modified.
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Declaring function parameters const indicates that the function promises not to change these values.
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