Summary  
This chapter covers formatting numeric and date outputs, including applying currency, percentage, and locale-based date formats, as well as defining custom numeric formats to control decimal places, separators, and symbols.  

General domain of usage  
Spreadsheet applications

In this chapter, we'll delve into formatting techniques that enhance the presentation and readability of **numeric data** in Excel. 

We'll cover how to **format numbers as currency, percentages, and dates**, as well as how to create **custom number formats** tailored to specific needs. 

## Key Points
- Use the **Locale** function in the **Number Format** menu to format dates to various styles and regional preferences;
- Format your numbers as a **Currency** in the **Number Format** menu;
- Change the **Currency Symbol** and the amount of **Decimal** places in your numbers;
- Create **Custom Number Formats** by selecting the **Custom** function;
- Utilise the **Quick Access** options in the **Number** group on the **Home** tab to adjust decimal places, apply main currency formats, percentages, and thousands separators.

import unittest
import json
from datetime import datetime


def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)


class TestUserCode(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        with open("payload.json") as f:
            data = json.load(f)
        cls.sheet = next(iter(data["sheets"].values()))

    def _cell_value(self, row, col):
        cell = (
            self.sheet.get("cellData", {})
            .get(str(row), {})
            .get(str(col))
        )
        return None if cell is None else cell.get("v")

    def _check_cell_value(self, row, col, cell_ref, *expected_values):
        actual = self._cell_value(row, col)

        _dynamic_test(
            self,
            actual in expected_values,
            f"{cell_ref} contains the expected value.",
            f"{cell_ref} should contain one of {expected_values!r}, but found {actual!r}."
        )

    def _check_date_or_serial(self, row, col, cell_ref, expected_date):
        actual = self._cell_value(row, col)

        excel_epoch = datetime(1899, 12, 30)
        dt = datetime.fromisoformat(expected_date)
        excel_serial = (dt - excel_epoch).days

        _dynamic_test(
            self,
            actual == expected_date or actual == excel_serial,
            f"{cell_ref} contains the correct date.",
            f"{cell_ref} should contain {expected_date!r} or Excel serial {excel_serial}, but found {actual!r}."
        )

    def test_first_date_is_present(self):
        self._check_date_or_serial(
            11, 7, "H12",
            "2024-09-16T00:00:00"
        )

    def test_last_date_is_present(self):
        self._check_date_or_serial(
            17, 7, "H18",
            "2024-09-22T00:00:00"
        )

    def test_rate_per_hour_value_is_present(self):
        self._check_cell_value(19, 8, "I20", 15.25, 15.3)

    def test_overtime_rate_is_present(self):
        self._check_cell_value(19, 9, "J20", 22.9)

    def test_total_pay_formula_or_value_is_present(self):
        self._check_cell_value(
            20, 14, "O21",
            "=SUM(I21:N21)",
            903.8625,
            903.86
        )

    def test_total_hours_formula_or_value_is_present(self):
        self._check_cell_value(
            18, 14, "O19",
            "=SUM(O12:O18)",
            53.25,
            53.3
        )


if __name__ == "__main__":
    unittest.main()

test_main.py

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Kickstart your journey with Excel by understanding its interface, basic functions, and essential data entry techniques. Learn how to navigate toolbars, worksheets, and master the fundamental elements to set a solid foundation.

Dive deeper into Excel by exploring advanced data entry and formatting options. Sharpen your skills in text and number formatting, discover how to effectively use styles, and enhance spreadsheet readability and functionality.

Unleash the power of Excel with an introduction to basic formulas and functions. Gain confidence in creating calculations, using cell references, and employing key functions like SUM, AVERAGE, MIN and MAX to automate and simplify your data analysis tasks.

In this section, you will master advanced Excel formulas and functions, enhancing your ability to manage complex calculations. Learn to display and audit formulas, utilize nested and logical statements, and apply conditions effectively to streamline your data analysis tasks.

Explore comprehensive techniques for sorting, filtering, and managing data efficiently. This section covers everything from basic data organization to advanced filtering and table management, ensuring you can handle and analyze data effectively.

Dive into the art of data visualization using Excel's powerful charting tools. You'll learn to create various types of charts, customize them to enhance visual appeal, and manipulate data within charts to present clear and compelling visual stories.

Gain proficiency in managing worksheets and workbooks within Excel. This section teaches you how to effectively organize and manipulate workbook elements, utilize formatting tools, and secure your work with passwords, providing a thorough grounding in workbook operations.

Number Formatting in Excel

Key Points

Number Formatting in Excel

Key Points

Solution