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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

instance method

Complex#to_s

to_s → string

Returns a string representation of self:

Example
Complex(2).to_s                      # => "2+0i"
Complex('-8/6').to_s                 # => "-4/3+0i"
Complex('1/2i').to_s                 # => "0+1/2i"
Complex(0, Float::INFINITY).to_s     # => "0+Infinity*i"
Complex(Float::NAN, Float::NAN).to_s # => "NaN+NaN*i"
See also #to_r #to_json also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0