End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

String#bytesize

bytesize → integer

static VALUE
rb_str_bytesize(VALUE str)
{
    return LONG2NUM(RSTRING_LEN(str));
}

Returns the count of bytes (not characters) in self:

Example

'foo'.bytesize        # => 3
'тест'.bytesize       # => 8
'こんにちは'.bytesize   # => 15

Example

'foo'.length       # => 3
'тест'.length      # => 4
'こんにちは'.length  # => 5

See also #bytes #byteslice #byterindex #bytesplice also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0