We also use these short forms in informal writing (for example, a letter or message to a friend).

Parenthetical phrases have been used extensively in informal writing and stream of consciousness literature.

The exclamation mark (！) is restricted to informal writing.

Many writers, especially in informal writing, have used multiple punctuation marks to end a sentence expressing surprise and question.

She stated, "If you find that in a child's or student's writing, that's an opportunity to address the differences between formal and informal writing.

However, in vernacular and informal writing of the period, the two letters may be used completely indiscriminately.

This term is used much more rarely, but occasionally appears in informal writing.

However, the exact opposite was true for informal writing.

Contractions are a common feature of English, particularly in ordinary speech and informal writing.

These forms are not uncommonly seen also in informal writing.