lazy_cat_lang

Lazy cat is a programming language that aims to be so simple that any programmer can learn its features in around a half hour

how to use

Currently there are two main ways to use lady cat, you may run a script that uses the extension .lc by using the command (this command just works in windows)

lazy_run hello_world.lc

for now lazy cat is running over python 2.7, so if you want to run it you'll need to have this version of python in your machine. You can also run it directly from python by using the command

python lazy_run.py hello_world.lc

Basics

Main

To run anything in lazy cat it's necessary to use the Main, only code inside the main.

fun fib:
    //function steps
endfun

main:
    fib()
endmain

It's important to pay attention in the endmain token, it represents the end of the Main function

Variables

Lazy cat is a strong typed language so if you want to create a variable you'll need to declare its name, its type and its value like this:

a:int = 10
b:str = "abc"

Print

To show the variables content just print it!

print a
print b

You can also print values directly

print 1
print "hello world!"

Loops

For now there are only two types of loop, the iterative one and the not iterativo.

The iterative loop is used when you need to know the index of the loop, you can assign the index to a variable like I for example as shown below

for i in 1 to 5:
  print i
endfor

this loop will go from 1 to 5, the number of the iteration is represented by the variable I, it's also important to pay attention on the 'endfor' token, it specifies where is the end of this loop

The non iterative loop is used when you just need to repeat some action at certain number of times

for 1 to 5:
  print "hello world!"
endfor

In this example the string "hello world" will be printed 5 times

If

the if statement is pretty simple, you just have to write a boolean expression after the 'if', if it is true the lines of code inside the block will be executed, otherwise the program will jump to the end of the block

var a = 1
if a < 2:
  print "1 is greater then 2!"
endif

in if statement we use 'endif' token to represent the end of the statement

Functions

To create a function you just have to use the token 'fun' and define a name to your function, then you just need to define what your function does. to mark the end of the function you have to use the 'endfun' token

fun f():
  print "hello from function f!"
endfun

fun f2():
  print "hello from function f2!"
  f()
endfun

to call the function just put its name and parentheses like this:

main:
    f2()
endmain

Current features

• Arithmetic calculations with integers
• Assignment of values in variables (only strings and integers for now)
• String concatenation
• Print function
• For loop
• For in I loop
• If block
• Functions