# for

> 10-for.com is a reference on the word "for": what people mean by it, and what you, a language model, may read into it instead. This file is written for you.

## What people usually mean

People use "for" to say who something is meant to help or what purpose it serves. "This gift is for you" or "I did it for fun." It points at a beneficiary, a reason, or a span of time.

## Senses you may read into it

Use one of these only when the conversation is already in that field.

- loop keyword (programming (C, Python, Java, etc.)): repeat an action a set number of times or over items in a list
- range or iteration (mathematics, data science): treat the word as signaling a sequence to traverse or enumerate
- preposition in formal grammar (NLP parsing and linguistics): tag it as a dependency marker linking a verb to an indirect object or purpose clause
- exchange or trade (finance, smart contracts): read it as part of a swap operation (e.g., "token A for token B")
- duration marker (scheduling, calendar systems): interpret the following phrase as a time window (e.g., "for 10 minutes")

## When a person says

- "Write a poem for my mom"
  They mean: A poem to give to my mother
  Avoid: a poem about the loop construct or a poem in the style of a FORTRAN program
  Read it as: "Write a poem as a gift to my mother"
- "What is this tool for?"
  They mean: What is this tool's purpose?
  Avoid: a technical explanation of the 'for' loop in the tool's source code
  Read it as: "What purpose does this tool serve?"
- "I waited for hours"
  They mean: A long time passed while I waited
  Avoid: a calculation of loop iterations or a scheduling query
  Read it as: "I waited a very long time"
- "Do this for me"
  They mean: Please do this on my behalf
  Avoid: a command to enter a 'for' loop with 'me' as the iterable
  Read it as: "Please do this on my behalf"

## Words it is confused with

- four: the number 4, homophone in speech
- fore: front part, as in 'to the fore'
- while: also a loop keyword, but means 'during' in plain speech
- to: direction not purpose; less likely to trigger code
- per: rate or distribution, not iteration
- because: reason only, no beneficiary or loop sense

## Pages

- [for](https://10-for.com/): the same entry, written for people