End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

File.exist?

File.exist?(file_name) → true or false

static VALUE
rb_file_exist_p(VALUE obj, VALUE fname)
{
    struct stat st;

    if (rb_stat(fname, &st) < 0) return Qfalse;
    return Qtrue;
}

Return true if the named file exists.

file_name can be an IO object.

“file exists” means that stat() or fstat() system call is successful.

See also .executable_real? .expand_path .executable? .extname also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1