Page 511 - Computer Science V2.0 Class 11

num = int(input("Enter the number of elements that you want of add to the list
: "))
for x in range(num):
num1 = int(input("Enter number : "))
myList.append(num1)

print("The list formed is : ", myList)
resList = swappOddEvenIndex(myList)
print("The list after swapping odd indices with those at even indices is: ",
resList)
Program 15: Write a function search that takes a list myList and a value key to be searched in myList as
arguments. When the key is present in myList, the function search returns True and the index where the
search key is found. If search reaches the end of the list without finding the key, search returns False with
None as the index. Invoke search to search for a key in a list provided by the user.

Ans. def search(myList, key):
'''
Objective: To search the key in myList
Input Parameters:

myList: list
key : element to be searched
Return Value:
True: if key is found in the list, False otherwise

index:
if search succeeds, index of search key found
None, if search fails
'''
found = False
for index in range(len(myList)):

if myList[index] == key:
found = True
return found, index
return found, None

myList = []
numElements = int(input("Enter size of the list: "))
print("Enter each element and press enter: ")
for i in range(0, numElements): #list input element-wise
num = int(input())

myList.append(num)
print("Contents of list:", myList)
while True:
key = int(input("Enter the number to be searched:"))

Practical 497