Calculator for functions of log trigonometry etc Go for it

[sdrpspnkr1384]

import numpy as nm
print(" Welcome to My Calculator ")
while True:
n = int(input('''
[1] Calculator
[2] Natural log fxn
[3] Trigonometric functions
[4] value of PI
[5] x^2
[6]power function
[7] Exit

               '''))
               
               
               
  if n==1:
      c = eval(input(" enter the  value :-  "))
      d = eval(input ("enter the value:-  "))
      e = input("choose operation (+ ,- ,*,/):- ")
      if e=='+':
            k= c+d
            print(k)
      elif e=='-':
             k= c-d
             print(k)
      elif e=='*':
              k=c*d
              print(k)
      elif e=='/':
              k= c/d
              print(k)
      else:
              print("Andha h Kya Laude")
   
        

           
  elif n==2:
           a= eval(input("enter the value:- "))
           if a<=0:
                 print(" andhe pahle ln function padh")
           else:
                k=nm.log(a)
                print( "ln",a,"=" ,k)  
  elif n==3:
            
            d = eval(input(" enter the value (Real number):-  "))
            c = input(" Choose (sine ,cos ,tan ) :-  ")
            if c =='sine':
                 k= nm.sin(d)
                 print(k)
            elif c=='cos':
                 k= nm.cos(d)
                 print(k)
            elif c=='tan':
                 k= nm.tan(d)
                 print(k)
                 
            else:
                 print(" Andha h Kya Laude ")
           
           
  elif n==4:
                print(3.14159265359)

                
                
                 
                 
                
                      
           
           
  elif n ==5:
           a = eval(input ("enter the value:-  "))
           k = pow(a, 2)
           print(k)
  elif n==6:
           
           a= eval(input("enter the value a :-"))
           b= eval(input("enter the value b :-"))
           c = input("Choose ( a^b=x , b^a=y):-  ")
           if c =='x':
                 k= pow(a, b)
                 print(k)
           
           elif c== 'y':
                  k=pow(b, a)
                  print(k)
           else:
                 print("andha h kya laude ")
                 
  elif n==7:
           
           
           break;
       
  else :
            print(" DEKH KAR CHOOSE KAR NA LAUDE ")