Respuesta :
A default argument is one that is automatically passed to a parameter when the argument is left out of the function call.
If the calling function fails to supply a value for the argument, the compiler will automatically assign the value specified in the default argument supplied in the function declaration. The default value is overridden if any value is given.
When the caller function supplies arguments with values, the default values are replaced. As an illustration, overwriting the value of z and w to 25 and 30 correspondingly when the function sum(10, 15, 25, 30) is called Function calls include the left-to-right copying of parameters from the caller function to the called function.
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