Description
This constant represents the mathematical constant $\pi$, symbolically.
i1 : pi
o1 = pi
o1 : Constant
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i2 : +pi
o2 = 3.141592653589793
o2 : RR (of precision 53)
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i3 : numeric_100 pi
o3 = 3.141592653589793238462643383279
o3 : RR (of precision 100)
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i4 : 2. * pi
o4 = 6.283185307179586
o4 : RR (of precision 53)
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