Welcome to the beta test for Introduction to IT!
Information Technology, commonly referred to as IT, refers to the use of technology to organize, store, share, and process information. The IT industry is growing quickly as companies become more and more technology-based. Introduction to IT is geared towards complete beginners looking to take their first steps into the world of IT. This course will cover foundational IT topics such as how a computer works, functions of an operating system, software development concepts, database fundamentals, and cybersecurity through beginner-friendly lessons and quizzes.
To that end allow me to introduce @adistasicc who worked on this course. They’re here to answer any questions you have about this course. We plan to leave this open for about 3 weeks before fully launching.
As a reminder you can find an explanation of the Beta testing process here.
So thanks for stopping by, please go take the course (Introduction to IT)and return to tell us what you think.
This statement immediately follows a description of four different number bases…
The position of a number indicates its underlying value. We start at value zero and increase by one each time we move to the left.
Can someone please explain what the learner is going to cognate from that statement?
Happy to! This sentence explains that the value of a digit is determined by its placement in a number. Its true value is determined when we take the digit value and multiply it by the base value to the power of the exponent value. The exponent value begins at 0 for the rightmost digit. The exponent value increases by 1 each time we move one digit to the left.
For further explanation, take the decimal number 123. Note that decimal values have a base of 10.
- The rightmost digit is 3. To determine this digit’s true value, we must multiply 3 by base value 10 to the power of 0 (10^0) which equals 3.
- The next value will be the digit to the left. In our example, 2 will be the next digit. To find this digit’s true value, we will use the same formula as before, but this time we will increase the exponent value by 1. So the true value of the second digit is 2 times 10^1 which equals 20.
- Continuing on, the next digit to the left is 1. We will once again increase the exponent value by 1 to find its value. Its true value is 1 multiplied by 10^2 which equals 100.
When we add the true value of each digit together, we get 100 + 20 + 3 which equals our value 123.
This seems simple with a decimal number, but we can apply this logic when determining the value of a number in other bases too. We can find the decimal value of binary number 101 like so:
- The rightmost value is 1 - its true value is determined by multiplying 1 with the value 2 to the power of 0 (2^0) which is 1. We use 2 here since that’s the base of binary values like 10 is the base of decimal values.
- The value of the next digit to the left is 0. We’ll increase the exponent value by 1. Its true value is 0 multiplied by 2^1 which equals 0.
- The value of the next digit to the left is 1. We’ll increase the exponent value by 1 again. Its true value is 1 multiplied by 2^2 which equals 4.
We’ll add each of the digit’s true values together to find the decimal value of the binary number 101. 4 + 0 + 1 = 5. So binary value 101 is equivalent to decimal value 5.
Hope this explanation helps clear things up a bit!
Learners who are not clear on the concept will appreciate this. However, imho, we should use the term ‘exponent’ in the narrative, straight away, to avoid any possible misinterpretation.
I’ll pass this along to the lesson’s author!! Thank you for the feedback
Hi all! Introduction to IT’s time in beta is coming to end as we are officially launching the course next week!
I just wanted to say thank you so much for taking the time to give this course a try and leaving feedback to help us improve our content. During its beta run, we added several new content items to the course including the Software Development Concepts project and the Troubleshooting Method article.
Be on the lookout for Introduction to IT’s official Codecademy debut on March 21st. Cheers!