Programming Language Interpreter

Implementation of a Simple Interpreter in Python.

Currently supports Assignment, While, Print, Branch and Comment Statements.

Syntax

Assignment Statement

Doesn't Support Parentheses.

Example

a = 1;
b = 11;
x = a+b;
z = a*b +z/b;

Print Statement

Python3-style print statement.

Using variables from above example

print("Value of x is ",x," and value of z is ",z);

While Statement

while , do and done and are keywords.

Example

fact = 1;
limit = 6;

while limit>1 do
  fact = fact*limit;
  limit = limit-1;
done;

Branch Statement

Supports if , if...else and nested-if statements.

Example

x=1;
y=2;
z=3;

if x<y then
	if z<y then
		ans = y;
	else
		ans = z;
	fi;
else
	if z>x then
		ans = z;
	else
		ans = x;
	fi;
fi;

print("Minimum Value is ",ans);

Comment Statements

Comments Start from <!-- and ends with -->.

Example

<!--
This is a Comment.
-->

x=1;
y=2;
z=3;