Linux-Easy to use calculator BC

If in the text mode, suddenly want to make some simple subtraction, but have no calculator at hand! Do you want to written calculation this time? Linux provides a computing program, that is BC. After you enter BC in the command line, the screen displays the version information and then goes to the stage of waiting for instructions. As shown below:

BC Output only integers by default, if you want to output the decimal point, then you have to run Scale=number, that number is the decimal place, for example:

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Linux-Easy to use calculator BC