what is a semicolon when it is used how to use

Dear Student,

A semicolon is a punctuation mark that is used within a sentence. It is a combination of a colon and a comma. That is why it is called as a semicolon. It is used when there is a need to link two independent clauses that are closely related in thought. It is used in the following manner:

• Let’s go to lunch; I forgot to bring food.
• He did not know the answer; he guessed and responded correctly.