Examples
// create some numbers pi = Sym("pi"); sqrt2 = Sym("sqrt(-2)"); // evalute to float with 60 decimal digits of precision, // thus we use ceil(60*(log(10)/log(2))) = 200 bits of precision Evalf( pi, 200 ) Evalf( sqrt2, 200, %f ) |  |  |
evalute to arbitrary precision float
f = Evalf( a, bits, real = %t )
symbolic
non-negative integer
boolean
symbolic
Evaluates a number a to a floating point number f with arbitrary precision.
The number of significant bits specifies the precision. For bits<=53 always standard double precision is used.
The flag real specifies whether the number a is real (%t) or complex (%f).
// create some numbers pi = Sym("pi"); sqrt2 = Sym("sqrt(-2)"); // evalute to float with 60 decimal digits of precision, // thus we use ceil(60*(log(10)/log(2))) = 200 bits of precision Evalf( pi, 200 ) Evalf( sqrt2, 200, %f ) | | |
SymEngine: C++ library for fast symbolic manipulation.