Question:

In the code found below, Can someon tell me what the apostrophe is used for? What is its purpose?

resp = resp + “<BusinessName id=’”+BusinessId+”‘>”+BusinessName+”</BusinessName>”;

Solution:

“<BusinessName id=’”+BusinessId+”‘>”+BusinessName+”</BusinessName>”
“<BusinessName id=’1′>Sample Business Name</BusinessName>”

resp = resp — indicates concatenation with older entry present in resp
+ — concatenate
“<BusinessName id=’” — This will indicate one string
+ — concatenate
BusinessId — The business Id to be used
+ — concatenate
“‘>” — one more part of the string
+ — concatenate
BusinessName — The business name
+ — concatenate
“</BusinessName>”

So a string would be inside “”

now we have

“<BusinessName id=’” — a single quote after the equals sign/ apostrophe
“‘>” — similarly here
This is used because id is an attribute of the BusinessName and all XML attribute values must be quoted
like id=’1′ or id = “1″

if we need to add “” double quotes we need to escape it with \
“<BusinessName id=\”"+BusinessId+”\”>”+BusinessName+”</BusinessName>”

hence the above snytax.

Hope this is clear.