Calling Functions: Quiz in JavaScript

Quiz: What would this code produce if we were to copy-paste it in a code editor and run it?

function greetCoder() {
	console.log("Hello!");
	console.log("Let's code!");
}
	
greetCoder();
greetCoder();

Options:

A: It would print:
```
Hello!
Let's code!
Hello!
Let's code!
```
B: It would print:
```
Hello!
Hello!
Let's code!
Let's code!
```
C: It would print:
```
Hello!
Let's code!
```

D: It would print:

Hello!
Let's code!
Hello!
Let's code!
Hello!
Let's code!

Important Note:

Do not use an actual code editor to get the answer! It would defy the whole purpose of the quiz!

Instructions:

Pick your answer and assign variable answer in the code editor with that answer.

For example, if you think the answer to the quiz is B, write let answer = "B" in the code editor and press Validate Solution!.

Understanding the Problem

The core challenge of this problem is to understand how function calls and console logging work in JavaScript. The function greetCoder is defined to print two lines of text. The function is then called twice. The task is to determine the exact output of these function calls.

Approach

To solve this problem, we need to follow these steps:

Understand what the function greetCoder does.
Determine what happens when greetCoder is called once.
Determine what happens when greetCoder is called twice.

Let's break it down:

The function greetCoder prints "Hello!" and "Let's code!" each time it is called.
When greetCoder is called once, it prints:
```
Hello!
Let's code!
```
When greetCoder is called twice, it prints the above output twice in sequence.

Algorithm

Here is a step-by-step breakdown of the algorithm:

Define the function greetCoder that prints two lines of text.
Call the function greetCoder twice.

Code Implementation

// Define the function greetCoder
function greetCoder() {
    // Print "Hello!" to the console
    console.log("Hello!");
    // Print "Let's code!" to the console
    console.log("Let's code!");
}

// Call the function greetCoder for the first time
greetCoder();

// Call the function greetCoder for the second time
greetCoder();

// Assign the correct answer to the variable 'answer'
let answer = "A";

Complexity Analysis

The time complexity of this problem is O(1) because the function calls and console logs are executed a fixed number of times, regardless of the input size. The space complexity is also O(1) as no additional space is used that grows with input size.

Edge Cases

There are no significant edge cases for this problem as the function behavior is straightforward and does not depend on any input.

Testing

To test the solution, you can manually verify the output by running the code in a JavaScript environment. Ensure that the output matches the expected result:

Hello!
Let's code!
Hello!
Let's code!

Thinking and Problem-Solving Tips

When approaching similar problems, consider the following tips:

Break down the problem into smaller parts and understand each part.
Write down the expected output for each step to avoid confusion.
Practice writing and running small pieces of code to understand their behavior.

Conclusion

In this blog post, we discussed how to determine the output of a simple JavaScript function that prints text to the console. We broke down the problem, provided a step-by-step approach, and analyzed the complexity. Understanding such basic problems is crucial for building a strong foundation in programming.

Additional Resources

For further reading and practice, consider the following resources: