Scilab is an open source programming language created in 1990.
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Scilab is an open source, crossplatform numerical computational package and a highlevel, numerically oriented programming language. It can be used for signal processing, statistical analysis, image enhancement, fluid dynamics simulations, numerical optimization, and modeling, simulation of explicit and implicit dynamical systems and (if the corresponding toolbox is installed) symbolic manipulations. Scilab is one of the two major opensource alternatives to MATLAB, the other one being GNU Octave. Read more on Wikipedia...
disp("Hello, world!")
disp("Hello World")
disp(%pi);
// A simple plot of z = f(x,y)
t=[0:0.3:2*%pi]';
z=sin(t)*cos(t');
plot3d(t,t,z)
Feature  Supported  Token  Example 

Scientific Notation  âœ“  
Integers  âœ“  // \d+ 

Floats  âœ“  // (\d+\.\d*\d*\.\d+)([eEf][+]?[09]+)? 

Strings  âœ“  "  "Hello world" 
Print() Debugging  âœ“  disp  
Line Comments  âœ“  //  // A comment 
Comments  âœ“  
Semantic Indentation  X 