Ch Standard Demos
ISO C90 Standard
Wide characters
ISO C99 Standard
C++ features
Complex IEEE floating-point arithmetic
Assumed-shape arrays
Nested functions
Interactive C statement execution
Interactive command shell
Shell Programming
Safe Ch
Ch applets
String Type
Adjustable array bounds
Auto array bound checking
Socket/Winsock
POSIX
Unix utilities for Windows
Windows
GTK+
X/Motif
OpenGL
Toolkits Demos
CGI
ODBC
ChExcel
Ch Professional Demos
Computational array
Plotting
Numerical analysis
C LAPACK functions
Ch supports all features in the ISO C standard called C90 which was ratified in 1990.
    #include <stdio.h>
    int main() {
        printf("Hello, world\n");
        return 0;
    }
    

The output is: Hello, world