putchar

Writes a character ch to stdout . Internally, the character is converted to unsigned char just before being written.

Equivalent to putc ( ch, stdout ) .

Parameters

Return value

On success, returns the written character.

On failure, returns EOF and sets the error indicator (see ferror() ) on stdout .

Example

#include <stdio.h>
#include <stdlib.h>
 
int main(void)
{
    int ret_code = 0;
    for (char c = 'a'; (ret_code != EOF) && (c != 'z'); c++)
        ret_code = putchar(c);
 
    // Test whether EOF was reached.
    if (ret_code == EOF && ferror(stdout))
    {
        fprintf(stderr, "putchar() failed in file %s at line # %d\n",
                __FILE__, __LINE__ - 6);
        perror("putchar()");
        exit(EXIT_FAILURE);
    }
    putchar('\n');
 
    // putchar return value is not equal to the argument
    int r = 0x1070;
    printf("\n0x%x\n", r);
    r = putchar(r);
    printf("\n0x%x\n", r);
}

abcdefghijklmnopqrstuvwxy
 
0x1070
p
0x70

References

See also