Computer Science
Grade 7
20 min
Built-in Functions
Built-in Functions
What you'll learn
- Identify and explain the key steps involved in the app publishing process, including platform selection, app store guidelines, and submission procedures, with 100% accuracy on a written quiz.
- Apply app store optimization (ASO) techniques to create a compelling app title, description, and keyword list for a sample app, resulting in a 20% increase in simulated app store search visibility based on provided ranking criteria.
- Evaluate the legal and ethical considerations related to app publishing, such as copyright, privacy policies, and user data security, by analyzing three provided app scenarios and identifying at least five potential issues per scenario.
- Solve common app publishing challenges, such as resolving app rejection issues and addressing user feedback, by proposing viable solutions for two given problem scenarios, judged by a rubric assessing feasibility and effectiveness.
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Define what a built-in function is and explain its purpose.
Identify and use common built-in functions for mathematical operations like abs(), max(), and min().
Use built-in functions to convert data types, such as int(), str(), and float().
Explain how to find the length of a string or list using the len() function.
Use the round() function to round numbers to a specified decimal place.
Combine multiple built-in functions to solve a single problem.
Describe the difference between a function's input (argument) and its output (return value).
Ever wonder how your calculator instantly knows an answer or a game knows your high score? 🤖 It's not magic, it's the power of built-in functions!
In this lesson, we'll explore special pre-made...
2
Key Concepts & Vocabulary
TermDefinitionExample
Built-in FunctionA pre-written command in a programming language that performs a specific task. You don't have to write the code for it; you can just call it by its name.The `print()` function is a built-in function that displays text on the screen.
Argument (Input)The value or information you give to a function inside its parentheses for it to work on.In `print("Hello")`, the argument is the string "Hello".
Return Value (Output)The result or answer that a function gives back after it has finished its task.The function `len("cat")` returns the value `3`.
Data Type ConversionThe process of changing a value from one data type to another, like from text (a string) to a whole number (an integer).`int("123")` converts the strin...
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Core Syntax & Patterns
Calling a Function
function_name(argument1, argument2, ...)
To use a function, you write its name followed by parentheses. Inside the parentheses, you place the arguments (inputs) the function needs, separated by commas if there are more than one.
Storing a Return Value
variable_name = function_name(argument)
Many functions give back a result (a return value). To save this result for later use, you must assign it to a variable using the equals sign (=).
Nesting Functions
outer_function(inner_function(argument))
You can use the return value of one function as the argument for another function. The inner function runs first, and its output becomes the input for the outer function.
4 more steps in this tutorial
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Sign Up Free to ContinueSample Practice Questions
Challenging
What is the final output of this code? `print(str(len([1, 2, 3])) + str(round(4.5)))`
A."35"
B.8
C."3 5"
D.An error
Challenging
What is the final value of `result` after this code runs? `num1 = -15`, `num2 = 10`, `result = max(abs(num1), num2)`
A.10
B.-15
C.An error
D.15
Challenging
Given `my_list = [-10, -20, 30]`, what is the output of `print(abs(min(my_list)) + max(my_list))`?
A.10
B.50
C.40
D.-10
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Frequently asked questions
What grade level is "Built-in Functions"?
Built-in Functions is a Grade 7 Computer Science lesson on ExcelOS.
What will I learn in Built-in Functions?
You'll be able to: Identify and explain the key steps involved in the app publishing process, including platform selection, app store guidelines, and submission procedures, with 100% accuracy on a written quiz; Apply app store optimization (ASO)….
Is "Built-in Functions" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Built-in Functions?
This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.