add two list with the help of lambda and map() by R4R Team

lambda function-
-In Python, anonymous function means that a function is without a name. As we already know that def keyword is used to define the normal functions and the lambda keyword is used to create anonymous functions.

Syntax-
lambda argument:expression

map() function-
-It is a python function which returns a list of the results after applying the given function to each item of a given iterable like list,tuple.

Syntax-
map(fun,iter)

Lambda with map function-
In map we require a function for argument, so at the place of the function, we create a lambda function.

Syntax-
map(lambda arg:exp,iter)

-Here we want to add two list with the help of the these two functions

Example-

list1 is [1,1,1,1]
list2 is [2,2,2,2]
sum is [3,3,3,3]


program-

print("Enter element in the first list")
l1=list(map(int,input().split()))
print("Enter element in the second list")
l2=list(map(int,input().split()))

print("List one is",l1)
print("List two is",l2)
#code for add two list with the help of map and lambda
add=map(lambda x,y:x+y,l1,l2)
print("After addition list become")
print(list(add))

output-

Enter element in the first list
1 2 3 4
Enter element in the second list
4 3 2 1
List one is [1, 2, 3, 4]
List two is [4, 3, 2, 1]
After addition list become
[5, 5, 5, 5]

Enter element in the first list
1 1 1 1 1 1
Enter element in the second list
1
List one is [1, 1, 1, 1, 1, 1]
List two is [1]
After addition list become
[2]

-In this program, we take a input of two list and using map(int,input().split()) we take input of integer value, then lambda x,y:x+y take two argument, one from list1 and another from list2. add add both number and return to add variable, at the last we print that resultant list.
-In the second output, we pass two list of unequal length and try to add them, then it only add upto small length list.