From 2fed48e17f159315544718f9a882ff3b0c98368e Mon Sep 17 00:00:00 2001
From: mrsh <marshalovecode@gmail.com>
Date: Wed, 21 Jan 2026 11:03:09 +0100
Subject: [PATCH] start of day 2

---
 week 1/day 2/exo1.py   |  6 +++++
 week 1/day 2/exo2.py   |  0
 week 1/day 2/exo3.py   | 19 +++++++++++++++
 week 1/day 2/readme.md | 55 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 80 insertions(+)
 create mode 100644 week 1/day 2/exo1.py
 create mode 100644 week 1/day 2/exo2.py
 create mode 100644 week 1/day 2/exo3.py
 create mode 100644 week 1/day 2/readme.md

diff --git a/week 1/day 2/exo1.py b/week 1/day 2/exo1.py
new file mode 100644
index 0000000..adf7086
--- /dev/null
+++ b/week 1/day 2/exo1.py	
@@ -0,0 +1,6 @@
+number = input("please enter an number :")
+
+if int(number) % 2:
+    print("Odd")
+else:
+    print("Even")
\ No newline at end of file
diff --git a/week 1/day 2/exo2.py b/week 1/day 2/exo2.py
new file mode 100644
index 0000000..e69de29
diff --git a/week 1/day 2/exo3.py b/week 1/day 2/exo3.py
new file mode 100644
index 0000000..a074b70
--- /dev/null
+++ b/week 1/day 2/exo3.py	
@@ -0,0 +1,19 @@
+name = input("please enter your name: ")
+badChar = False
+
+for ch in name:
+    if ch == ' ' or ( '0' <= ch <= '9'):
+        badChar = True
+        break
+    
+
+#  verify if name less than 20 charachter, start with a letter and don't contain a bad Chararccer 
+
+first = name[0]
+isLetter = ('A' <=  first <= 'Z') or ( 'a' <=  first <= 'z')
+
+
+if(len(name) <= 20 and badChar == False and isLetter ):
+    print("Accepted")
+else:
+    print("Refused")
\ No newline at end of file
diff --git a/week 1/day 2/readme.md b/week 1/day 2/readme.md
new file mode 100644
index 0000000..4eeea2d
--- /dev/null
+++ b/week 1/day 2/readme.md	
@@ -0,0 +1,55 @@
+# Day 2
+
+## Exercises (Submit for Grading)
+
+### Exercise 1 — Even / Odd
+
+Ask for a number and print:
+
+"Even" or "Odd"
+
+use: 
+```python
+n % 2
+```
+
+## Exercise 2 — Count Letters
+
+Given a string:
+
+count only alphabetic characters
+
+ignore digits and symbols
+
+## Exercise 3 — Rebuild Your C Validator (Python)
+
+Write your own version (no copy-paste):
+
+≤ 20 characters
+
+starts with letter
+
+no digits
+
+no spaces
+
+## Exercise 4 — Real-World Scenario
+
+Given:
+
+users = ["admin", "root1", "John_Doe", "Alice", "Bob42"]
+
+Print only valid usernames.
+
+Exercise 5 — Algorithm Explanation (Text)
+
+Answer:
+1. What happens to runtime if the list doubles in size?
+
+2. Write the formula.
+
+Expected:
+
+T(n) = c × n
+
+Explain in words.
\ No newline at end of file