📚 Topic Summary
Data type conversion, also known as type casting, is the process of changing a variable from one data type to another. This is crucial in programming because different data types are stored and manipulated differently by the computer. Understanding when and how to convert data types allows programmers to write more efficient and accurate code. For instance, you might need to convert a string representing a number into an integer to perform mathematical operations, or convert a floating-point number to an integer for specific array indexing.
Implicit conversion happens automatically by the compiler, while explicit conversion requires the programmer to use specific functions or operators. Mastering data type conversion is vital for avoiding errors and ensuring the desired behavior of your programs. This worksheet will help you practice identifying and applying correct conversion techniques. Let's dive in!
🧠 Part A: Vocabulary
Match the following terms with their definitions:
| Term |
Definition |
| 1. Integer |
A. Conversion performed automatically by the compiler. |
| 2. Float |
B. A whole number (positive or negative) without any decimal point. |
| 3. String |
C. Converting one data type to another, either implicitly or explicitly. |
| 4. Type Casting |
D. A sequence of characters, such as letters, numbers, and symbols. |
| 5. Implicit Conversion |
E. A number that contains a decimal point. |
✏️ Part B: Fill in the Blanks
Fill in the blanks with the correct term from the word bank: explicit, integer, float, string, data type.
When you convert a number stored as a ________ to a ________, you are performing a ________ conversion. An ________ variable can hold values like 1, 2, or -5, while a ________ variable can hold values like 3.14 or -2.5.
🤔 Part C: Critical Thinking
Explain a scenario where you would need to convert a string to an integer in a program. What could happen if you didn't perform the conversion?