In this context, "pi" is what's known as an "indeterminate symbol." Its value is truly symbolic, and therefore pure, even though it can never be exactly expressed as any rational number. The context is calculus: any discrete attempt to represent its value will by definition come endlessly close to the actual, pure value, but can never reach it. Yet, calculus-based equations can use it as-is.

In reply to Re^2: Euler's identity in Raku by Anonymous Monk
in thread Euler's identity in Raku by tomasz

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