added direct type conversion (codebasics#18)

direct datatype conversion at the time of input

Author: Raghav219-si

Basics/test.py

@@ -1,8 +1,6 @@
 def sum(a,b):
     return a+b
 
-n1=input('enter first number: ')
-n1=int(n1)
-n2=input('enter first number: ')
-n2=int(n2)
-print('sum is: ',sum(n1,n2))
+n1=int(input('enter first number: '))
+n2=int(input('enter first number: '))
+print('sum is: ',sum(n1,n2))