Full stop (Britain) and Period (US) (.)
The period is the most terminal mark of punctuation.
A period is used at the end of a declarative sentence. For example: We have nothing to fear but fear itself.
A period is used at the end of an imperative sentence. For example: Go at once. She said, “Help me”.
NOTE: Do not use a period when an imperative sentence is so strong that it becomes an exclamation. Such a sentence is followed by an exclamation mark. Whether an imperative sentence is ended by a period or an exclamation mark depends entirely on the degree of emphasis desired:
- “Go at once!” he shouted.
- “Help!” she cried.
A period is used at the end of a sentence that is interrogative in form but to which an answer is not required. For example:
Children, will you stop that noise at once.
Periods are used in courtesy titles and abbreviations of rank which appears before a name.For example:
- Mr. Rakesh
- Lt. Mohan Singh
- Dr. Smith
A period is used to represent a decimal point.
Example: 20.4, 58.5%
A period is used after figures and letters to represent principal divisions of lists. For example:
- A. Expenses
- V. Gross income
- 1. Net income
- a. Net earning per share
NOTE: Do not use a period when the figures or letters are in parenthesis such as : (1) Net income
A period is used with many abbreviations. Such as:
Use periods for academic degrees when abbreviated. Such as:
NOTE: Do not use a period with abbreviations that are accepted as the shortened form of proper nouns. Such as:
The period is placed outside the closing parenthesis when the parenethesis encloses the last word of a sentence. The period is placed inside the closing parenthesis only when what is enclosed in parenthesis is a complete sentence and the first letter is capitalized. Example:
- This is called the law of natural selection (Darwinism).
It is wrong to write as: This is called the law of natural selection. (This law cannot be too highly stressed in the study of biology.)
When a sentence ends with an abbreviation that requires a period of its own, no second period is added. For example:
For your first school-day, you must remember to take paper, pencils, erasers,etc.
A period is used to mark the end of a group of words that is not a full sentence, but which is complete in itself. For example:
- Over an over.
- Again and again.
Nowadays after Dr, Mr, Mrs, St(Saint) full stop is not used. For example:
- Dr Hari Prasad
- Mr (also Mr.)
- Mrs (also Mrs.)
- Ms (also Ms.)