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Python | sympy.gamma() method

20 June 2025

With the help of sympy.gamma() method, we can find the gamma function in SymPy. gamma(z) represents $\Gamma(z) = \int_0^\infty t^{z - 1}e^{-t}\, dt,$ which for positive integer z is the same as $(z - 1)!$ .

Syntax: gamma(Z)

Parameters:
Z – It is the input value to the gamma function.

Returns: Returns the gamma function result of the input value.

Example #1:

# import sympy  
from sympy import * 
  
Z = 5
print("Z = {}".format(Z)) 
   
# Use sympy.gamma() method  
gamma_Z = gamma(Z)   
      
print("gamma(Z) : {}".format(gamma_Z))   

Output:

Z = 5
gamma(Z) : 24

Example #2:

# import sympy  
from sympy import * 
  
X = symbols('x') 
print("X = {}".format(X)) 
   
# Use sympy.gamma() method  
gamma_X = gamma(X)   
      
print("gamma(X) : {}".format(gamma_X))   