User:Abwayax/Smeth language sketch

The goal of the Smeth project is to create a programming language that resembles the English language as much as possible.

Basic syntax rules

Smeth syntax closely follows English grammar.

• Statements begin with a capital letter and end with a period.
• Multiple statements are chained together by commas, with the final statement ending in a period.
• Variables are case-sensitive.
• Parentheses act as comment delimiters outside of statements. Inside of statements they group expressions.

Hello world program

Print "Hello world!".

Setting variables

Set x to 3 * x + 1.

If statement example

If x equals 3 * x + 1, then print "Awesome", else, print "No way!".

Multiple lines

If answer equals 42 and answer equals 6 * 9:
	Print "That's it. That's all there is.",
	Set marvin to "Paranoid Android",
	Print marvin,
	Print answer.

For loop example

Loop i from 1 to 10, increasing i by 1: Print i.

While loop example

While i is less than 10, increase i by 1. (You could also write "Set i equal to i + 1.")

Function declaration

Declare function foo with parameters bar, baz, qux:
	Return bar + baz + qux.

Print foo 2, 3, 4.

Functions that take one parameter and return a truth value can be used as such:

Declare function even with parameter number:
	Return 0 equals number modulo 2. 

If n is even, print "n is even!", else, print "n is odd!".

Array creation, access, and modification

Set odds to 1, 3, 5, 7, 9, 10.
Remove element 6 from odds. (odds now has 1, 3, 5, 7, 9)
Add 11 to odds. (odds has 1, 3, 5, 7, 9, 11)
Set element 6 in odds to 13. (odds = 1, 3, 5, 7, 9, 13)
Add 11 to odds at position 6. (odds = 1, 3, 5, 7, 9, 11, 13)
Print element 0 in odds. (prints 1)
Print odds. (prints 1, 3, 5, 7, 9, 11, 13)

Foreach loop

For each element e in odds, print e.

Multiline version

For each element e in odds:
	Print e,
	Print e + 1,
	Print foo e, e+2, e+4.