method

math_mode=

v2_1_10 - Show latest stable - Class: IRB::Context

math_mode=(opt)

public

Sets bc mode, which loads lib/mathn.rb so fractions or matrix are available.

Also available as the -m command line option.

See IRB@Command+line+options and the unix manpage bc(1) for more information.

# File lib/irb/ext/math-mode.rb, line 29
    def math_mode=(opt)
      if @math_mode == true && !opt
        IRB.fail CantReturnToNormalMode
        return
      end

      @math_mode = opt
      if math_mode
        main.extend Math
        print "start math mode\n" if verbose?
      end
    end

math_mode=

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