C Language: perror function(Print Error Message)

In the C Programming Language, the perror function write an error message to the stderr stream in the following format:

string: error-message

Syntax

The syntax for the perror function in the C Language is:




void perror(const char *s);



Parameters or Arguments

s

The string portion of the error message written to stderr.

Note

The error-message portion of the error message written to stderr is equivalent to the value returned by the strerror function with the call strerror(errno).

Returns

The perror function returns a nonzero value if the error indicator is set. Otherwise, it returns zero.

Required Header

In the C Language, the required header for the perror function is:




#include <stdio.h>



Applies To

In the C Language, the perror function can be used in the following versions:

  • ANSI/ISO 9899-1990

stdio.h Functions





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