Syntax error Check if string begins with punctuation in JavaScript

Check if string begins with punctuation in JavaScript

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
Updated on: 2020-09-01T11:14:53+05:30

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