Period Marks

Overview

A period (.) is the most common punctuation mark in English. It is mainly used to end statements but also appears in abbreviations, numbers, and special cases. Correct use of periods keeps writing clear and professional.

Ending declarative sentences

Use a period at the end of a sentence that makes a statement.

• Example: The train leaves at noon.

Ending polite requests

Some requests that sound like commands may end with a period instead of an exclamation point.

• Example: Please pass the salt.

With abbreviations

Periods are used in many abbreviations, such as titles, measurements, or shortened words.

• Example: Dr. Lee works on Main St.

With initials

When writing someone’s initials, use a period after each letter.

• Example: J. K. Rowling is a famous author.

With numbers and decimals

A period separates whole numbers from decimal parts.

• Example: The toy costs $5.75.

With time

Use periods in a.m. and p.m. when writing clock times.

• Example: The party starts at 6:30 p.m.

In web and email addresses

Periods are part of website and email addresses.

• Example: Visit www.schoolnews.com or contact me at student@email.org.

Avoiding misuse

Do not use a period in place of other punctuation like question marks or exclamation points. Avoid doubling periods unless you are using an ellipsis.

• Example: 

                Incorrect: Where are you.

                Correct: Where are you?

Summary

Periods mark the end of statements and are also used in abbreviations, initials, decimals, times, and addresses. They are small but essential for clear, correct writing. Mastering period use helps students write in a way that is professional and easy to understand.