The program is an illustration of functions; functions are used to represent collection of named statements
The function in Python where comments are used to explain each line is as follows:
#This defines the function
def checkList(nums,num):
#This checks if num exists in nums
if num in nums:
#If yes, this returns the index of num
return nums.index(num)
#If otherwise, this returns -1
return -1
Read more about Python programs at:
https://brainly.com/question/26497128
#SPJ1