💡 Activity Solution

1️⃣ What is a Variable, and why do we need it?

• A variable is a container in memory that stores data temporarily while the program runs.
• We need it to hold, update, and reuse information such as names, numbers, or results.

2️⃣ What is a Constant, and why do we need it?

• A constant is a read-only container whose value cannot change once assigned.
• We need it to protect fixed values (like π = 3.14) from being modified accidentally.

3️⃣ What is a Memory Cell?

• A memory cell is a small storage unit in RAM that holds the binary bits of a variable’s value.

4️⃣ What is an Identifier?

• An identifier is the name given to a variable or constant so the programmer can refer to it easily (e.g., Age, PI).

5️⃣ What is a Memory Address, and what is its relation to location in memory?

• A memory address is the exact location of a memory cell inside the computer’s RAM.
• Each variable is stored at a unique address — just like houses have unique addresses.

6️⃣ Which numbering system is used to represent memory addresses?

• Memory addresses are represented in hexadecimal (base 16) form, e.g., 0x7FFF89A2.

7️⃣ Mention the primary types of variables.

• Integer (Int) → whole numbers (e.g., 25)
• Float/Double → decimal numbers (e.g., 3.14)
• String → text (e.g., "Omar")
• Boolean → True/False (e.g., True)

8️⃣ What are the number types, and give examples for each.

• Integer (Int): Whole numbers (e.g., −10, 0, 150)
• Float (Decimal): Numbers with fractions (e.g., 3.5, 7.25)

9️⃣ What is a String, and give an example of it.

• A String stores text or characters, written between quotation marks.
  Example: "Hello World" or "Mohammed".

🔟 What is a Boolean, and give an example of it.

• A Boolean represents True or False values used in decisions.
• Example: IsStudent = True or HasLicense = False.