How to use Regular Expressions In Javascript
- Split the text into sentences using a regular expression.
- Capitalize the first letter of each sentence using a combination of toUpperCase() and substring().
Example: Here, is the implementation of the above approach
function capitalizeSentences(text) {
// Split the text into sentences
// using regular expressions
const sentences = text.split(/\.|\?|!/);
// Capitalize the first letter of each sentence
const capitalizedSentences = sentences
// Remove empty sentences
.filter(sentence =>
sentence.trim() !== '')
.map(sentence =>
sentence.trim()[0]
.toUpperCase() +
sentence.trim().slice(1));
// Join the sentences back together
return capitalizedSentences.join('. ') + '.';
}
const inputText =
`geeks for geeks for
students.hello students.`;
const result = capitalizeSentences(inputText);
console.log(result);
Output
Geeks for geeks for
students. Hello students.
JavaScript Program to Capitalize the First Letter of Every Sentence in a String
In this article, we will see how Capitalizing the first letter of every sentence in a string is a common text manipulation task in JavaScript. It involves identifying sentence boundaries and ensuring that the first letter of each sentence is in uppercase.
Examples:
Input: "this is Geeks for Geeks website. hello there!"
Output: "This is Geeks for Geeks website. Hello there!"
Input: "hello. how are you."
Output: "Hello. How are you."
Table of Content
- Method 1: Using Regular Expressions:
- Method 2: Using slice() Method
- Method 3: Using forEach and String Manipulation
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