How can I calculate pi using Bash command

How can I calculate pi using Bash command

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round up the bc scale instead of round down with scale or printf [duplicate]

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How to compare two floating-point values in shell script

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Why bc and args doesn't work together in one line?

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Most elegant unix shell one-liner to sum list of numbers of arbitrary precision?

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Convert signed 10 bit binary numbers to decimal?

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In bash how do I divide two variables and output the answer rounded upto 5 decimal digits? [duplicate]

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How to print float numbers with awk

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Subtract corresponding lines

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