Exercise 06-06:
Modify the Exercise 6.5 program to search for p and v throughout the list and inform the user of the position in which p and the position in which v were found.
Answer:
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# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 06/exercise-06-10.py.py
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L = [15, 7, 27, 39]
p = int(input("Enter the value to search for (p):"))
v = int(input("Enter the other value to search for (v):"))
x = 0
foundP = -1 # Here -1 indicates we haven't found the value yet
foundV = -1
first = 0
while x < len(L):
if L[x] == p:
foundP = x
if L[x] == v:
foundV = x
x += 1
if foundP != -1:
print(f"p: {p} found at position {foundP}")
else:
print(f"p: {p} not found")
if foundV != -1:
print(f"v: {v} found at position {foundV}")
else:
print(f"v: {v} not found")
# Check if both were found
if foundP != -1 and foundV != -1:
# since foundP and foundV store the positions where they were found
if foundP <= foundV:
print("p was found before v")
else:
print("v was found before p")