Post History

Define a mathematical expression in English [released]

# Background

Inspired by [this challenge that is also a mathematical English translator](https://codegolf.codidact.com/posts/283865).

# Challenge

Write a program that translates a mathematical expression using English with the following specifications:

- The expression can only take in numbers, letters from the English alphabet, the equal sign, and the arithmetic operators. No, exponents aren't arithmetic.
- If the target character(s) is a/are number(s):
  - The number range can only be from `-999` up to `999`.
  - When in the tens place, use the dash (`-`) when there are spaced numberings. For example, `21` is `twenty-one`.
  - When in the hundreds place, add `and` to the string if the tens and/or the ones place aren't empty. For example, `125` is `one hundred and twenty-five`.
  - If the number is negative, use `negative` before the number. For example, `-13` is `negative thirteen`.
- If the target character is a letter:
  - The input should only take 1 letter.
  - When put on the result, the letter must be capitalized.
- If the target character is a symbol:
  - `+` is `plus`.
  - `-` is `minus`.
  - `*` is `times`.
  - `/` is `divided by`.
  - `=` is `equals` or `is equal to`.
- Parentheses shouldn't be inputted.
- Whitespaces are ignored.
- Any character that's not part of the specification is ignored.
- Trailing whitespaces and newlines are allowed.
- This is <a class="badge is-tag">code-golf</a>, so the shortest program for each language wins!

# Test Cases

```none
// Input
# Output

14
fourteen

1+2
one plus two

53 /3
fifty-three divided by three

6 +2* 7 =20
six plus two times seven equals twenty

8*8*8 * 8 * 8 -1
eight times eight times eight times eight times eight minus one

= 4
is equal to four

x + y = z
X plus Y equals Z

-5 +- 6
negative five plus negative six

Testcases by [**@celtschk**](https://codegolf.codidact.com/comments/thread/4623#comment-13896):

500
five hundred

129
one hundred and twenty-nine

0+0=0
zero plus zero equals zero

0 -- 0 = 0
zero minus negative zero equals zero
```

Define an equation in English

# Background

Inspired by [this challenge that is also a mathematical English translator](https://codegolf.codidact.com/posts/283865).

# Challenge

Write a program that translates an equation using English with the following specifications:

- The equation can only take in numbers, letters from the English alphabet, the equal sign, and the arithmetic operators. No, exponents aren't arithmetic.
- If the target character(s) is a/are number(s):
- - The number range can only be from `-999` up to `999`.
- - When in the tens place, use the dash (`-`) when there are spaced numberings. For example, `21` is `twenty-one`.
- - When in the hundreds place, add `and` to the string if the tens and/or the ones place aren't empty. For example, `125` is `one hundred and twenty-five`.
- If the target character is a letter:
- - The input should only take 1 letter.
- - When put on the result, the letter must be capitalized.
- If the target character is a symbol:
- - `+` is `plus`.
- - `-` is `minus`.
- - `*` is `times`.
- - `/` is `divided by`.
- - `=` is `equals` or `is equal to`.
- Parentheses shouldn't be inputted.
- Whitespaces are ignored.
- This is <a class="badge is-tag">code-golf</a>, so the shortest program for each language wins!

# Test Cases

```none
// Input
# Output

14
fourteen

1+2
1 plus 2

53 /3
53 divided by 3

6 +2* 7 =20
6 plus 2 times 7 equals twenty

8*8*8 * 8 * 8 -1
8 times 8 times 8 times 8 times 8 minus 1

= 4
is equal to 4

x + y = z
X plus Y equals Z
```