readme.md

ELang

ELang is a simple programming language written in Java. It is strongly typed imperative language.

I originally created it to educate myself in better understanding programming languages.

In it's current version ELang includes:

• Arithmetical expressions
• Boolean expressions
• Defining variables
• Defining functions
• Printing to the standard output
• Reading from the standard input
• If and while statements
• Built-in math functions
  • sin
  • cos
  • tan
  • cotan
  • pow
  • abs
  • ceil
  • floor
  • round
  • log

Example

Here is a sample program which can be used for finding factorial and the n-th number of Fibonacci:

ELang

def fibonacci(n)
    if n >= 0:
        a1 = 0;
        a2 = 1;
        current = 0;
        while n > current:
            temp = a2;
            a2 = a1 + a2;
            a1 = temp;
            current = current + 1;
        endwhile;
        result = a1;
    else:
        result = 0;
    endif;
    return result;
enddef;

def recursiveFibonacci(n)
    if n == 0:
        return 0;
    endif;
    if n == 1:
        return 1;
    endif;
    return recursiveFibonacci(n - 1) + recursiveFibonacci(n - 2);
enddef;

def factorial(n)
    result = 1;
    current = 1;
    while current <= n:
        result = result * current;
        current = current + 1;
    endwhile;
    return result;
enddef;

print 'Enter n for fibonacci number: ';
n = read;
print 'The result for the fibonacci number entered is: ';
print fibonacci(n);
print '\n';

print 'Enter n for fibonacci number: ';
n = read;
print 'The result for the fibonacci number using the recursive fibonacci function is: ';
print recursiveFibonacci(n);
print '\n';

print 'Enter n for factorial: ';
n = read;
print 'The result for the number you entered for factorial is: ';
print factorial(n);
print '\n';

License

The language is distributed under the terms of the GPLv3.0.