diff --git a/day 3.txt b/day 3.txt
index 16e1ad2..b286a0d 100644
--- a/day 3.txt	
+++ b/day 3.txt	
@@ -50,3 +50,21 @@ sets, list, tuples
 #learnt about dictionary, boolean data type, binary data type.
 #swap and delete in python is so easy. about operator and all
 
+
+#jun 3 - day 5
+Type Casting 
+Type casting is explicitly converting a variable from one data type to another using built-in functions like int, float, str
+
+Conditional statements like if-else, if elif-else:
+Nested a loop .
+
+Jun 4 - day 6
+string mehtods like strip(), lower(),title()]
+the input dyanmics
+
+Jun5 - day 7
+while condition with boolean flags
+break and continue usage
+append() and len() function uses
+list use 
+
diff --git a/day5.py b/day5.py
new file mode 100644
index 0000000..544dc16
--- /dev/null
+++ b/day5.py
@@ -0,0 +1,38 @@
+age_input = "19"                   #here it is string data type
+
+#age = age_input+1                  #ERROR: Can not add number to a string
+#print(age)
+
+#solution: type casting
+age_input = int(age_input)        #type casted to integer
+
+print(age_input + 1)
+
+raw_score = "3.96"
+
+#Casting string to float
+final_score = float(raw_score)
+print(f"Converted {raw_score} to float: {final_score}")
+
+
+user_score = float(input("Enter your GPA score(0.00 - 4.00): "))
+
+#Conditional decision making:
+if user_score >= 3.60:
+    print("Good Peformance | A Grade")
+elif user_score >= 3.00:
+    print("Solid work | B Grade")
+elif user_score >= 2.00:
+    print("Satisfactory | C Grade")
+else:
+    print("Needs Improvement | D Grade")
+
+user_input = input("Enter any integer to check if it is even or odd:")
+
+#checking using nested loops:
+if user_input.isdigit():                 #checking if the input is a digit
+    number = int(user_input)             #type casted to integer
+    if number % 2 == 0:
+        print(f"{number} is an even number.")
+    else:
+        print(f"{number} is an odd number.")
\ No newline at end of file
diff --git a/day6.py b/day6.py
new file mode 100644
index 0000000..a8c07ee
--- /dev/null
+++ b/day6.py
@@ -0,0 +1,22 @@
+#DAY 6
+
+# input
+raw_name = input("Enter your full name: ")
+
+# Cleaning the data
+clean_name = raw_name.strip().title()
+
+# Using the data in a logical check
+department = input("Enter your department (CSE/CE/AR): ").strip().upper()
+
+print(f"\n--- Student Profile Created ---")
+print(f"Name: {clean_name}")
+print(f"Department: {department}")
+
+# 4. Checking content within strings
+email = input("Enter your email address: ").strip().lower()
+
+if "@" in email and email.endswith(".com"):
+    print("Email Status: Valid format.")
+else:
+    print("Email Status: Invalid. Please check your email entry.")
\ No newline at end of file
diff --git a/day7.py b/day7.py
new file mode 100644
index 0000000..ed8edd2
--- /dev/null
+++ b/day7.py
@@ -0,0 +1,38 @@
+print("-------------------------")
+print("---System Registration---")
+print("-------------------------")
+
+active = True
+
+registered_users = []
+
+while active:
+  username = input("\nCreate a username.Or type 'exit' to quit: ").strip().lower()
+
+  if username == "exit":
+    print("Closing registration system")
+    break     #Loop ends immediately.
+
+  if len(username) < 4:
+    print("⚠️ Error: Username must be at least 4 characters long.")
+    continue   # skips the rest of the code, it goes to the top
+  
+  #only if the input passes validation above
+  print(f"✅ Username '{username}' is available!")  
+
+  #storing users into a list
+  registered_users.append(username)
+
+  current_count = len(registered_users)
+  print(f"Total users registered till now are: {current_count}")
+
+  #adding more users
+  choice = input("Register another user?(yes/no): ").strip().lower()
+  if choice != "yes":
+    active = False  
+    #since the while runs for the true so the loop will end if user puts anything beside yes
+
+print("\nSystem shut down successfully.")
+print("\n---Final Database Summary---")
+print(f"Total successfull registrations: {len(registered_users)}")
+print(f"Registered List: {registered_users}")
\ No newline at end of file
diff --git a/projec.py b/projec.py
new file mode 100644
index 0000000..c51d3f7
--- /dev/null
+++ b/projec.py
@@ -0,0 +1,29 @@
+print("-----Should I go to College?-(Bot)-----")
+
+#The initialize scenario
+today_status = {
+  "is_raining": True,
+  "is_assignment_due" :False,
+  "is_practical_day": True
+}
+
+#Input from user
+energy_level = int(input("How is the energy level today(1-10): "))
+feeling_lazy = input("Are you feeling extra lazy today?(yes/no):").lower()=="yes"
+
+#Let's make a decision
+print("\n--Decision Making--")
+
+if today_status["is_practical_day"] or today_status["is_assignment_due"]:
+  print("Verdict! YOU MUST GO Practical marks and assignments are too important to skip!")
+
+elif today_status["is_raining"] and feeling_lazy:
+    print("Verdict: STAY HOME. It's raining and you're tired. Perfect day for self-study in VS Code.")
+
+elif energy_level > 7 and not feeling_lazy:
+    print("Verdict: GO TO CLASS. You have the energy, don't waste the day!")
+
+else:
+    print("Verdict: YOUR CHOICE. Maybe just join the theory session and come back early.")
+
+print("\n==========================================")