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

instance method

String#empty?

string.empty? → true or false

static VALUE
rb_str_empty(VALUE str)
{
    if (RSTRING_LEN(str) == 0)
        return Qtrue;
    return Qfalse;
}

Returns true if the length of self is zero, false otherwise:

Example

"hello".empty? # => false
" ".empty? # => false
"".empty? # => true

See also #each_line #encode #each_grapheme_cluster #encode! also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1