INTERVIEW QUESTIONS WEB JAVA SCRIPT DETAILS

Question: How do I ...
with JavaScript/JScript
... use quotation marks when scripting?

Answer: There are two types of quote mark in JavaScript, the single-quote (') and double-quote ("). Either can be used to delimit a string literal, or sequence of characters. For example:

myDblQString = "This string is surrounded by double-quote marks.";
mySngQString = 'This string is surrounded by single-quote marks.';

However, since HTML itself makes extensive use of double-quotes within tags, it's a good idea to use single-quotes to set off strings in your scripts. This is particularly useful when your code contains quoted elements, as follows:

onClick = "alert( 'Are you sure?' )";

Strings containing apostrophes, which are identical to single-quotes, require you to use the backslash character () to escape the apostrophes, as shown below:

myEscString = 'John didn't like Mary's hat.';

Quoted strings can be combined with other strings, whether literals or variables:

errMsg = "Passwords are case-sensitive.";
message = "Error: " + errMsg;
// assigns 'Error: Passwords are case-sensitive.' to message

There are two types of quote mark in JavaScript, the single-quote (') and double-quote ("). Either can be used to delimit a string literal, or sequence of characters. For example:

myDblQString = "This string is surrounded by double-quote marks.";
mySngQString = 'This string is surrounded by single-quote marks.';

However, since HTML itself makes extensive use of double-quotes within tags, it's a good idea to use single-quotes to set off strings in your scripts. This is particularly useful when your code contains quoted elements, as follows:

onClick = "alert( 'Are you sure?' )";

Strings containing apostrophes, which are identical to single-quotes, require you to use the backslash character () to escape the apostrophes, as shown below:

myEscString = 'John didn't like Mary's hat.';

Quoted strings can be combined with other strings, whether literals or variables:

errMsg = "Passwords are case-sensitive.";
message = "Error: " + errMsg;
// assigns 'Error: Passwords are case-sensitive.' to message Source: CoolInterview.com

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