The default in C is to make calls by reference to limit a called function's ability to alter variables in the calling function.

Name: The default in C is to make calls by reference to limit a called function's ability to alter variables in the calling function.
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In C, the default method for function calls is pass-by-value, where a copy of the variable is passed, not a reference, limiting the called function's ability to alter the original variable's value in the calling function.

The Default in C Is to Make Calls by Reference