Introduction to Functions
Introduction to Functions
In programming, a function is like a little machine that does a specific job whenever you ask it to.
What is a Function?
Think of a function as a recipe in a cookbook. Just like a recipe tells you how to make a cake step-by-step, a function tells the computer how to do a task step-by-step.
When you want to use the recipe, you "call" it. The function then follows the instructions inside and gives you the result.
Why Use Functions?
- Save Time: Instead of writing the same code over and over, you write a function once and reuse it.
- Keep Things Organized: Functions help break a big problem into smaller parts.
- Make Code Easier to Understand: Functions have names that describe what they do.
Example of a Function
Here is a simple example in JavaScript:
If you call greet("Alice"), it will give back "Hello, Alice!".
Try It Yourself!
Imagine you want to add two numbers. You could write a function like this:
Calling addNumbers(3, 5) will give you 8.
Try this one out for yourself:
Loop
Answer:
A programming structure that repeats a block of code.
Iteration
Answer:
Each time a loop runs.
For Loop
Answer:
A loop that repeats a fixed number of times.
While Loop
Answer:
A loop that continues as long as a condition is true.
Infinite Loop
Answer:
A loop that never stops because the condition is always true.
Break
Answer:
A command that stops the loop before it finishes normally.
Continue
Answer:
A command that skips the current loop iteration and moves to the next.
Range
Answer:
A function used with for loops to specify how many times to repeat.
Nested Loop
Answer:
A loop inside another loop.
Condition
Answer:
An expression that evaluates to true or false, used in while loops.
Index
Answer:
The position number of an item in a list, often used in loops.
Loop Variable
Answer:
A variable that changes value in each iteration of the loop.
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