How to Match decimal numbers and currency in Regex.mp4

Download How to Match decimal numbers and currency in Regex.mp4

Here’s a simple and easy explanation of how to match decimal numbers and currency values using Regex, along with clear examples.

✔️ Matching Decimal Numbers & Currency in Regex

🟦 1. Matching Decimal Numbers

Decimal numbers are numbers that may have a decimal point.

Examples:

✅ Basic Regex for Decimal Numbers

\d+(\.\d+)?

✔️ Explanation

\d+ → one or more digits
(.\d+)? → optional decimal part
- \. → the dot
- \d+ → digits after the dot
- ? → the whole decimal part is optional

✔️ Matches

12
12.5
150.00

❌ Does NOT match

.75 (because it requires digits before the dot)

🟦 2. Matching Decimals With Optional Leading Zero

If you want to allow numbers like .75, use this:

✅ Regex

\d*(\.\d+)?

✔️ Matches

.75
0.75
12.9
12

🟦 3. Allowing Either Integer or Decimal, but Not Empty

This is often used in real applications.
You want either:

digits only → 45
digits + decimals → 45.90
dot + decimals → .90

✅ Better Regex

\d+(\.\d+)?|\.\d+

🟦 4. Matching Currency Values (₹, $, €, etc.)

Currency usually has:

Symbol → $, ₹, €, £
Decimal part with exactly 2 digits → .00, .50, .99
Optional commas → 1,000.50

Examples:

$10.99
₹1,200.00
€0.50
£99

✔️ 4.1 Currency With Symbol & Optional Decimal

✅ Regex

[$₹€£]\d+(\.\d{2})?

✔️ Explanation

[$₹€£] → matches one symbol
\d+ → the number
(\.\d{2})? → optional .00 decimal part with 2 digits

✔️ Matches

$10
$10.99
₹50.00
€9.50

✔️ 4.2 Currency With Commas (1,000.00)

✅ Regex

[$₹€£]\d{1,3}(,\d{3})*(\.\d{2})?

✔️ Explanation

\d{1,3} → first group (1–3 digits)
(,\d{3})* → optional groups of ,000
(.\d{2})? → optional decimal part

✔️ Matches

$1,000.00
₹25,50,000.99 (Indian numbering also works depending on format)
€999.50

🟩 5. Currency Without Symbol (just numbers like 10.99)

If you want to match only valid currency decimals, exactly 2 digits:

✅ Regex

\d+(\.\d{2})?

✔️ Matches:

10
10.99

❌ Does NOT match:

10.9
10.999

🟩 6. Complete Universal Regex

Match currency numbers with optional:

symbol
commas
decimals

✅ Universal Regex

([$₹€£])?\d{1,3}(,\d{3})*(\.\d{2})?

🎉 Summary (Super Simple)

Purpose	Regex
Basic decimal	`\d+(\.\d+)?`
Allow `.75`	`\d*(\.\d+)?`
Currency with symbol	`[$₹€£]\d+(\.\d{2})?`
Currency with commas	`[$₹€£]\d{1,3}(,\d{3})*(\.\d{2})?`
Strict 2-decimal currency	`\d+(\.\d{2})?`

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Explaination about Shorthand character sets.mp4

Download Explanation about Regex shortnand character sets.mp4

Here’s a simple and clear explanation of the most common Regex shorthand character sets, with easy examples to help you understand how they work.

✅ Regex Shorthand Character Sets (Explained Simply)

Regular expressions (regex) use shorthand character sets to make pattern-matching easier.
Instead of writing long character ranges, you can use short symbols like \d, \w, \s, etc.

Below is a friendly explanation of each.

🔹 1. `\d` → Digit characters

Meaning: Matches any number from 0–9

Examples:

Regex: \d
Matches: 3 in "A3Z"
Regex: \d\d
Matches: "45" in "Age: 45"

🔹 2. `\D` → Non-digit characters

Meaning: Matches anything except 0–9

Examples:

Regex: \D
Matches: A in "A3"
Regex: \D+
Matches: "Name" in "Name123"

🔹 3. `\w` → Word characters

Meaning: Matches

Letters (A–Z, a–z)
Numbers (0–9)
Underscore (_)

Examples:

Regex: \w
Matches: a in "a!"
Regex: \w+
Matches: "Hello123" in "Hello123!!"

🔹 4. `\W` → Non-word characters

Meaning: Matches anything except letters, numbers, and underscore

Examples:

Regex: \W
Matches: ! in "Hi!"
Regex: \W+
Matches: " @#" in "User @# Name"

🔹 5. `\s` → Whitespace characters

Meaning: Matches spaces, tabs, and newlines
(space, \t, \n)

Examples:

Regex: \s
Matches the space in "Hello World"
Regex: \s+
Matches " " (multiple spaces)

🔹 6. `\S` → Non-whitespace characters

Meaning: Matches anything that is not space, tab, or newline

Examples:

Regex: \S
Matches: H in " Hello"
Regex: \S+
Matches: "Hello" in "Hello World"

📌 Additional Character Class Shorthands (POSIX Style)

Some regex engines (like Linux grep -E, PHP, Perl) use POSIX character classes inside [[: ... :]].

Examples:

🔹 `[:digit:]` → Digits (0–9)

🔹 `[:alpha:]` → Alphabet letters (A–Z, a–z)

🔹 `[:alnum:]` → Letters + numbers

🔹 `[:upper:]` → Uppercase letters

🔹 `[:lower:]` → Lowercase letters

Example use:

[[:digit:]]+

Matches "2024" in "Year: 2024"

🎯 Summary Table (Quick View)

Shorthand	Meaning	Example Match
`\d`	Digit	`5`
`\D`	Not a digit	`A`
`\w`	Word character	`A`, `3`, `_`
`\W`	Not word character	`!`
`\s`	Whitespace	(space)
`\S`	Non-whitespace	`H`
`[[:digit:]]`	Digit	`7`
`[[:alpha:]]`	Letters	`A`, `z`

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How to install nano for Windows.mp4

Download How to Install Nano on Windows .mp4

✅ How to Install Nano on Windows

Nano is a lightweight, beginner-friendly text editor commonly used on Linux systems. You can use Nano on Windows too — through several methods.

Method 1: Install Nano Using Windows Subsystem for Linux (WSL)

(Recommended — easiest and most stable)

Step 1: Enable WSL

Open PowerShell as Administrator
Run:

wsl --install

After rebooting, Windows will install a Linux distribution (usually Ubuntu).

Step 2: Update Linux

Open the Linux terminal and run:

sudo apt update

Step 3: Install Nano

sudo apt install nano

✔ You can now run Nano in Windows through WSL:

nano filename.txt

Method 2: Install Nano Using Git for Windows

If you install Git for Windows, Nano is already included.

Step 1: Download Git

👉 https://git-scm.com/download/win

Step 2: Install Git

During installation:

On the "Choose your default editor" screen
✔ select Nano

After installation, open:

Git Bash

Now use:

nano test.txt

Method 3: Install Nano Using Chocolatey (Package Manager)

If you use Chocolatey:

Step 1: Install Chocolatey (if not installed)

Run PowerShell as Administrator:

Set-ExecutionPolicy Bypass -Scope Process -Force; `
[System.Net.ServicePointManager]::SecurityProtocol = `
[System.Net.ServicePointManager]::SecurityProtocol -bor 3072; `
iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

Step 2: Install Nano

choco install nano

Run Nano:

nano filename.txt

Method 4: Portable Nano for Windows (Manual Install)

A native Windows build exists but is less maintained.

Download:

👉 https://nano-editor.org/dist/win32-support/

After extracting:

Open CMD in the folder
Run:

nano.exe file.txt

How to Match decimal numbers and currency in Regex.mp4

✔️ Matching Decimal Numbers & Currency in Regex

🟦 1. Matching Decimal Numbers

✅ Basic Regex for Decimal Numbers

✔️ Explanation

✔️ Matches

❌ Does NOT match

🟦 2. Matching Decimals With Optional Leading Zero

✅ Regex

✔️ Matches

🟦 3. Allowing Either Integer or Decimal, but Not Empty

✅ Better Regex

🟦 4. Matching Currency Values (₹, $, €, etc.)

✔️ 4.1 Currency With Symbol & Optional Decimal

✅ Regex

✔️ Explanation

✔️ Matches

✔️ 4.2 Currency With Commas (1,000.00)

✅ Regex

✔️ Explanation

✔️ Matches

🟩 5. Currency Without Symbol (just numbers like 10.99)

If you want to match only valid currency decimals, exactly 2 digits:

✅ Regex

🟩 6. Complete Universal Regex

✅ Universal Regex

🎉 Summary (Super Simple)

Explaination about Shorthand character sets.mp4

✅ Regex Shorthand Character Sets (Explained Simply)

🔹 1. \d → Digit characters

🔹 2. \D → Non-digit characters

🔹 3. \w → Word characters

🔹 4. \W → Non-word characters

🔹 5. \s → Whitespace characters

🔹 6. \S → Non-whitespace characters

📌 Additional Character Class Shorthands (POSIX Style)

🔹 [:digit:] → Digits (0–9)

🔹 [:alpha:] → Alphabet letters (A–Z, a–z)

🔹 [:alnum:] → Letters + numbers

🔹 [:upper:] → Uppercase letters

🔹 [:lower:] → Lowercase letters

🎯 Summary Table (Quick View)

How to install nano for Windows.mp4

✅ How to Install Nano on Windows

Method 1: Install Nano Using Windows Subsystem for Linux (WSL)

Step 1: Enable WSL

Step 2: Update Linux

Step 3: Install Nano

✔ You can now run Nano in Windows through WSL:

Method 2: Install Nano Using Git for Windows

Step 1: Download Git

Step 2: Install Git

Method 3: Install Nano Using Chocolatey (Package Manager)

Step 1: Install Chocolatey (if not installed)

Step 2: Install Nano

Method 4: Portable Nano for Windows (Manual Install)

Download:

✅ Recommended Option

How to Match decimal numbers and currency in Regex.mp4

🔹 1. `\d` → Digit characters

🔹 2. `\D` → Non-digit characters

🔹 3. `\w` → Word characters

🔹 4. `\W` → Non-word characters

🔹 5. `\s` → Whitespace characters

🔹 6. `\S` → Non-whitespace characters

🔹 `[:digit:]` → Digits (0–9)

🔹 `[:alpha:]` → Alphabet letters (A–Z, a–z)

🔹 `[:alnum:]` → Letters + numbers

🔹 `[:upper:]` → Uppercase letters

🔹 `[:lower:]` → Lowercase letters