Big Data and AI

Lesson 1.4 – Data Types in Excel: Text, Numbers, and Dates Excel interprets data differently depending on its type. Understanding how Excel classifies text, numbers, and dates is essential for accurate calculations, sorting, filtering, and data analysis. This lesson explains how each data type works and how Excel behaves when processing them. 1. Text (Strings) Text is any content that Excel does not recognize as a number or date. Text is aligned to the left by default. It is commonly used for labels, names, categories, and descriptive information. Examples of text: Product A January Invoice #4521 ABC123 Even numeric-looking values may be treated as text if they contain leading zeros, spaces, or non-numeric characters. 2. Numbers Numbers are values Excel can use in calculations. They are aligned to the right by default. Numbers can represent quantities, prices, percentages, measurements, or any numeric data. Examples of ...

Lesson 1.3 – Workbooks, Worksheets, Cells, and Ranges This lesson introduces the fundamental structural elements of Excel: workbooks, worksheets, cells, and ranges. Understanding these components is essential before working with data, formulas, or analysis tools. The concepts explained here form the foundation of all Excel operations. 1. Workbooks A workbook is the Excel file itself. Each workbook can contain one or more worksheets. Workbooks are used to organize related data within a single file. For example, a financial model, a budget, or a project plan is typically stored in one workbook with multiple worksheets. Examples of workbook names: Budget_2024.xlsx Sales_Report_Q1.xlsx Inventory_Tracking.xlsx Workbooks can be saved in different formats, such as .xlsx (standard), .xlsm (with macros), or .csv (comma-separated values). 2. Worksheets A worksheet is a single page inside a workbook. Worksheets are used to separate d...

Lesson 1.2 – The Excel Interface: Ribbon, Tabs, Groups, and Formula Bar This lesson provides a clear and structured explanation of the Excel interface. Understanding the interface is essential before entering data or using formulas. Each component of the interface has a specific purpose, and learning how these elements work will allow you to navigate Excel efficiently and perform tasks with accuracy. 1. Overview of the Excel Interface When you open Excel, the screen is divided into several functional areas. Each area is designed to help you perform specific actions such as formatting data, inserting formulas, creating charts, or managing files. The main components are: Title Bar Ribbon Tabs Groups Formula Bar Worksheet Area (Grid) Status Bar The following sections describe each component in detail. 2. Title Bar The Title Bar is located at the top of the Excel window. It displays the name of the current workbook (...

Lesson 1.1 – What Is Excel and Why It Matters Worldwide This lesson introduces Microsoft Excel from a practical and professional perspective. The objective is to understand what Excel is, why it is used globally, and how it supports everyday work in business, finance, operations, and data analysis. The explanations are designed for learners with no prior experience. 1. What Excel Is Microsoft Excel is a spreadsheet application used to store, organize, calculate, and analyze data. It is part of the Microsoft 365 suite and is available on Windows, macOS, and the web. Excel is based on a grid structure composed of rows and columns, which allows users to work with numerical and textual information in a structured and scalable way. Excel is commonly used for: data entry and data organization mathematical and statistical calculations financial analysis and budgeting reporting and data visualization business planning and forecasting ...