Scientific Notation Regex Pattern
Validates numbers in scientific/exponential notation like 1.5e10 or -3.14E-5. Standard format for very large or small numbers.
Live Regex Tester
Pattern Breakdown
Code Examples
JavaScript
const regex = /^-?\d+(\.\d+)?[eE][+-]?\d+$/; const test = "6.022e23"; console.log(regex.test(test)); // true // Extract matches const matches = test.match(regex); console.log(matches);
Python
import re pattern = r'^-?\d+(\.\d+)?[eE][+-]?\d+$' test = "6.022e23" match = re.search(pattern, test) print(match) # Found!
Go
package main
import (
"fmt"
"regexp"
)
func main() {
re := regexp.MustCompile(`^-?\d+(\.\d+)?[eE][+-]?\d+$`)
fmt.Println(re.MatchString("6.022e23")) // true
}Common Use Cases
Match Examples
| Input | Result |
|---|---|
| 6.022e23 | Match |
| 6.022f23 | No Match |
About the Scientific Notation Regex
Validates numbers in scientific/exponential notation like 1.5e10 or -3.14E-5. Standard format for very large or small numbers.
Regular expressions (regex) are powerful pattern matching tools used across virtually all programming languages. The scientific notation pattern is classified as intermediate difficulty in the numbers category. It works in all major programming languages.
When using this regex, always consider edge cases and test thoroughly with real-world data. Use the interactive tester above to validate the pattern against your specific inputs before deploying to production.
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Frequently Asked Questions
What is the Scientific Notation regex pattern?
Validates numbers in scientific/exponential notation like 1.5e10 or -3.14E-5. Standard format for very large or small numbers.
How do I use the Scientific Notation regex?
Use the pattern /^-?\d+(\.\d+)?[eE][+-]?\d+$/ in your code. In JavaScript: new RegExp('^-?\d+(\.\d+)?[eE][+-]?\d+$', ''). Test it above with your own input.
What does this Scientific Notation regex match?
This pattern matches: "6.022e23". It does NOT match: "6.022f23". Scientific computing, data analysis, engineering calculations.
Is the Scientific Notation regex beginner-friendly?
This pattern is rated Intermediate. It uses some advanced features like character classes and quantifiers.
What languages support the Scientific Notation regex?
This pattern works in all major programming languages including JavaScript, Python, Java, C#, Go, Ruby, PHP, and more. Syntax may vary slightly between regex engines.
Can I modify the Scientific Notation regex for my use case?
Yes! Use the interactive tester above to modify the pattern and test with your own data. Common modifications include making it case-insensitive (add 'i' flag), matching globally (add 'g' flag), or adjusting character classes.