# Squirrel (programming language)

Paradigm Multi-paradigm: scripting, imperative, functional, object-oriented 2003 Alberto Demichelis 2.2.3 (30, 2009) Dynamic Lua, Python, C++, Javascript Dao, MiniD Cross-platform zlib/libpng license squirrel-lang.org

Squirrel is a high level imperative/OO programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games. MirthKit, a simple toolkit for making and distributing open source, cross-platform 2D games, uses Squirrel for its platform.[1] It is used extensively by Code::Blocks for scripting.

## Syntax

Squirrel uses a C-like syntax

Factorial in Squirrel:

``` function factorial(x)
{
if (x == 0) {
return 1;
}
else {
return x * factorial(x-1);
}
}

```

Random numbers using generators:

``` function gen_random(max) {
local last=42
local IM = 139968;
local IA = 3877;
local IC = 29573;
for(;;) {  //loops forever
yield (max * (last = (last * IA + IC) % IM) / IM);
}
}

local randtor = gen_random(100);

for(local i = 0; i < 10; i += 1)
print(">"+resume randtor+"\n");
```

Classes and inheritance:

``` class BaseVector {
constructor(...)
{
if(vargc >= 3) {
x = vargv[0];
y = vargv[1];
z = vargv[2];
}
}

x = 0;
y = 0;
z = 0;
}

class Vector3 extends BaseVector {
{
if(other instanceof this.getclass())
return ::Vector3(x+other.x,y+other.y,z+other.z);
else
throw "wrong parameter";
}
function Print()
{
::print(x+","+y+","+z+"\n");
}
}

local v0 = Vector3(1,2,3)
local v1 = Vector3(11,12,13)
local v2 = v0 + v1;
v2.Print();
```

## History

The language was made public in 2003 under the zlib/libpng license. It is developed and maintained by Alberto Demichelis.

## References

1. MirthKit Developer Wiki

de:Squirrel (Programmiersprache)