Check if string begins with punctuation in JavaScript

JavascriptWeb DevelopmentObject Oriented Programming

Let’s say we have the following strings. One of them is beginning with a question mark i.e. punctuation −

var sentence1 = 'My Name is John Smith.'
var sentence2 = '? My Name is John Smith.'

We need to check whether any of the above two sentences begin with punctuation. To check if string begins with punctuation, the code is as follows −

Example

var punctuationDetailsRegularExpression=/^[.,:!?]/
var sentence1 = 'My Name is John Smith.'
var output1 = !!sentence1.match(punctuationDetailsRegularExpression)
if(output1==true)
   console.log("This ("+sentence1+") starts with a punctuation");
else
   console.log("This ("+sentence1+") does not starts with a punctuation");
var sentence2 = '? My Name is John Smith.'
var output2 = !!sentence2.match(punctuationDetailsRegularExpression)
if(output2==true)
   console.log("This ( "+sentence2+") starts with a punctuation");
else
   console.log("This ( "+sentence2+" ) does not starts with apunctuation");

To run the above program, you need to use the following command −

node fileName.js.

Here my file name is demo209.js.

Output

This will produce the following output −

PS C:\Users\Amit\javascript-code> node demo209.js
This (My Name is John Smith.) does not starts with a punctuation
This ( ? My Name is John Smith.) starts with a punctuation
raja
Published on 01-Sep-2020 14:44:27
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