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$\mathrm{\pi }$

$\mathrm{\pi }$

$\mathrm{evalf}\left(\mathrm{\pi }\right)$

$3.141592654$

$\mathrm{evalf}\left(\cos \left(1\right)+\sin \left(1\right)\mathrm{I}\right)$

$0.5403023059+0.8414709848\mathrm{I}$

$\mathrm{evalf}\left(\frac{3}{4}{x}^2+\frac{1}{3}x-\mathrm{sqrt}\left(2\right)\right)$

$0.7500000000x^2+0.3333333333x-1.414213562$

$f≔\mathrm{int}\left(\exp \left(x^3\right)\,x=0..1\right)$

$f≔{\int }_0^1{\ⅇ}^{x^3}\ⅆx$

$\mathrm{evalf}\left(f\right)$

$1.341904418$

$g≔\mathrm{Sum}\left(\frac{1}{\mathrm{sqrt}\left(x\right)}\,x=1..1000\right)$

$g≔\sum _{x=1}^{1000}\frac{1}{\sqrt{x}}$

$\mathrm{evalf}\left(g\right)$

$61.80100877$

$\mathrm{evalf}\left[3\right]\left(\mathrm{\pi }\right)$

$3.14$

$\mathrm{evalf}\left[15\right]\left(\mathrm{\pi }\right)$

$3.14159265358979$

For detailed information including:

Complete description of all parameters

Controlling numeric precision of computations

Special evaluation for user-defined constants and functions

see the evalf/details help page.