Chicken Programming Language

A simple and light programming language for basic problem solving and calculation.

Commands to create compiler chick.exe

bison -d chicken.y
flex chicken.l
gcc -o chick lex.yy.c chicken.tab.c

Run program

1. Interactive mode command is chick.
2. To run a script, command is chick <file-name>.txt.
   For example, chick sample-programs/8_prime_numbers.txt.

Table of content

Topic	Description
Data types	Numbers: Default data type. Similar to C double data type. String: Similar to C character array.
Variables initialization	All variables are initialized globally. variablename := expression; i := 0; firstVariable := -21.5;
Comment	Single line comment starts with # character. # This is a comment
Print statement	Prints expression or string without newline. print expression; print 10+20; print firstVariable; print string; print "Hello world\n";
Scan statement	Only works in interactive mode. scan variable; scan firstVariable;
Operators	Precedence: ( expression ) print (10+20)/3; Output: 10 ^: Exponent print 8.3^2; Output: 68.89 not: Logical NOT print not 0; Output: 1 * : Multiplication print 2*4; Output: 8 / : Division print 4/2; Output: 2 % : Modulus print 11%3; Output: 2 + : Plus print 4+2; Output: 6 - : Minus print 4-2; Output: 2 >= : Grater than or equal print 11 >= 4.2; Output: 1 <= : Less than or equal print 11 <= 11; Output: 1 = : Equal to print 4 = 4; Output: 1 != : Not equal to print 4 != 4; Output: 0 > : Grater than print 4 > 2; Output: 1 < : Less than print 4 < 2; Output: 0 and : Logical AND print 1 and 0; Output: 0 or : Logical OR print 1 or 0; Output: 1
If Else	if expression then statement if not 0 then print "Hello\n"; if expression then statement else statement if 0 then print "Zero\n"; else print "Not zero"; if expression then statement else if expression then statement else statement number1 := -10; number2 := -7; if number1 = number2 then print "number1 = number2"; else if number1 > number2 then print "number1 > number2"; else print "number1 < number2";
While loop	while expression then statement i := 0; while i < 10 then {     print i;     print "\n";     i := i + 1; }
For loop	for variable : (start, end, step) then statement Where,         variable: A pre-initialized variable.         start: An expression defining where to start the loop.         end: An expression defining when to end the loop.         step: An expression defining the value variable will be incremented with. Example 1: i := 0; for i : (0, 5, 1) then print i; Output: 0 1 2 3 4 Example 2: i := 0; for i : (5, 0, -1) then print i; Output: 5 4 3 2 1 Pseudocode for example 1: initialize i ← 0 set start as reference to i set start ← 0, end ← 5, step ← 1 while (start < end) do     execute statements     start ← start + step end while
Exit program	Keyword exit terminates the program. exit;
Random number	random(lower, upper) Returns a randomly generated number within lower to upper. print random(1.21, 3.15);
Necessary maths	abs(x) Returns absolute value of given number. print abs(-21.65); Output: 21.65 sqrt(x) Returns square root √x of given number. print sqrt(81); Output: 9 floor(x) Returns the nearest integer less than given argument. print floor(31.91); Output: 31 ceil(x) Returns the nearest integer grater than given argument. print ceil(31.91); Output: 32
Logarithm	log(x) Returns natural logarithm of a number x with base e. print log(10); Output: 2.302585 log(x, base) Returns natural logarithm of a number x with base given as parameter. print log(100, 2); Output: 6.643856 exp(x) Returns e (2.71828) raised to the power of the given argument. print exp(10); Output: 22026.465795
Trigonometry	PI The keyword PI π returns the ratio of a circle’s circumference to its diameter. print PI; Output: 3.141593 sin(x) Returns the sine of an argument (angle in radian). print sin(PI/2); Output: 1 asin(x) It takes a single argument (-1 ≤ x ≤ -1), and returns the arc sine (inverse of sin) in radian. print asin(0.5); Output: 0.523599 cos(x) Returns the cosine of an argument (angle in radian). print cos(PI/2); Output: 0 acos(x) It takes a single argument (-1 ≤ x ≤ -1), and returns the arc cosine (inverse of cosine) in radian. print acos(0.5); Output: 1.047198 tan(x) Returns the tangent of an argument (angle in radian). print tan(PI/4); Output: 1 atan(x) It takes a single argument, and returns the arc tangent (inverse of tangent) in radian. print atan(0.5); Output: 0.463648

Licensed under Apache License 2.0.