How to evaluate an algebraic expression in Sympy

Recipe Objective - How to evaluate an algebraic expression in Sympy?

Sympy provides evalf() function, which can convert SymPy expressions to floating-point approximations (decimal numbers).

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Example:

# Importing libraries
from sympy import pi, pprint

# Default
print(pi.evalf())

# 3 decimal numbers
print(pi.evalf(3))

# 10 decimal numbers
print(pi.evalf(10))


Output - 
3.14159265358979
3.14
3.141592654

In this way, we can evaluate an algebraic expression in sympy.