What is Microsoft Excel?

Feature          | Use Case
-----------------|--------------------
Formulas         | =SUM(A1:A10)
Functions        | VLOOKUP, IF, COUNTIF
Pivot Tables     | Data summarization
Charts/Graphs    | Visualize trends
VBA Macros       | Automate tasks
Data Validation  | Dropdown lists
Conditional Format| Color highlights

A1     → Column A, Row 1
B10    → Column B, Row 10
Z99    → Column Z, Row 99
AA100  → Column AA, Row 100
XFD1048576 → Last cell (16M cells)

=SUM(A1:A100)           → Total range
=AVERAGE(B2:B50)        → Mean value
=COUNTIF(C:C,"Paid")    → Count matches
=VLOOKUP(D1,E:F,2,FALSE)→ Lookup table
=IF(A1>100,"High","Low") → Condition
=MAX(A1:A20)            → Largest value
=MIN(B1:B20)            → Smallest value
=TODAY()                → Current date
=ROUND(A1,2)            → 2 decimal places
=CONCAT(A1," ",B1)     → Join text

.xlsx  → Modern (2007+) Default
.xls   → Legacy (pre-2007)
.csv   → Comma separated values
.xlsxm → Macro-enabled
.xltx  → Template

1985 → Excel 1.0 (Mac first)
1987 → Windows version
1993 → Excel 5.0 (VBA)
2007 → .xlsx format
2016 → Power Query
2021 → Python integration
2026 → AI Copilot