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!pip install jovian --upgrade --quiet
import jovian

Question 1: The user will enter a list of numbers and a separate number. The program will display the index at which the number is present in the list. If the number is absent, it'll return -1. Do NOT use built-in functions for searching.

l1=list(input('Enter a list of numbers:'))
n= input('Enter the number you want the index of:')
i=0
ind=0
flag=0
for i in range(0,len(l1)):
    if n==(l1[i]):
        ind=i
        flag=1
if flag==1:     
    print('{} found at index {}'.format(n, ind))
else:
    print(-1)
Enter a list of numbers:12345 Enter the number you want the index of:5 5 found at index 4