Method: IO#putc

Defined in:
io.c

#putc(obj) ⇒ Object

If obj is Numeric, write the character whose code is the least-significant byte of obj. If obj is String, write the first character of obj to ios. Otherwise, raise TypeError.

$stdout.putc "A"
$stdout.putc 65

produces:

AA

Returns:



7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
 
# File 'io.c', line 7782

static VALUE
rb_io_putc(VALUE io, VALUE ch)
{
    VALUE str;
    if (RB_TYPE_P(ch, T_STRING)) {
	str = rb_str_substr(ch, 0, 1);
    }
    else {
	char c = NUM2CHR(ch);
	str = rb_str_new(&c, 1);
    }
    rb_io_write(io, str);
    return ch;
}