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New programming language designed for children who can read and write.

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Child-Lang

New programming language designed for children who can read and write. Child-Lang is a language for trainers who want to teach programming to children in their native language before modern languages.

How to install

  • Get Visual Studio Code
  • Install extension named Child Lang
  • Create a new file with extension .child and type print hello world
  • Press F6 to execute

Note: Browser based version is under construction. Please support this project.

Motivation

Children who can read and write in their language can learn to code. Visual programming references like code.org supports coding without typing. So, after code.org experiments child will be ready for coding. But, there is no programming language designed for children to the very first experiment. They are able to write programs in their native language. For example, printing something to screen is "print Hello" in English and "yaz Merhaba" in Turkish etc. Considered non-alphanumeric characters, indention and other tokens are needed for lexing or parsing purposes.

This language goals to train children for a print and read variables, math operations with a simple if while, function implementations. "print hello" is very simple instead of "std::getline(std::cin, str);". Sure, they are able to learn python, ruby, c++ and the other modern languages and all they are lovely. But learning logic of coding is more important to learn a language designed to solve all problems.

Design rules

  • Variables must be uppercase characters or numeric with leading uppercase character
  • Block bodies must be separated with a single empty line
  • Commands and parameters must be separated with one or more space. Like print 1, print 2
  • No inner or subcommands are supported in the body.

Before a training

  • Language must be experienced by the trainer before the child.
  • TODO: Read how to train a child with Child Lang.

Types

  • String : All characters supported by UTF-8. All nodes not parsed as other type is considered as String.
  • Number : Considered as Double ( 1, 2, 3, 4.56, 0.67 )
  • Boolean : true, false or expression in natural language like 1 equals 1, 3 greater 2

Variable

Any upper case string without space and leading uppercase character ( AGE, NAME1)

Commands with args

print ( string, number, math expression, bool expression)

print hello
print hello world
print Remember remember the fifth of November
print -- Heading --
print Today is the 3rd day of week
print "what is your name"
print 1 plus 2
print 4 equals 5

read ( variable )

read LINE
read NAME

assign

YEAR        2019
MONTH       11
PI          3.14
TOTAL       123 plus 456
GREATER     2 greater 1
SAME        3 equal 3
NAME        John Smith
ADDRESS     123 4rd Ave 5th Floor, New York, NY 12345, United States of America

boolean argument

1 equals 2
3 greater 4
5 lesser 5
VAR1 equals 6
VAR2 equals VAR3

math argument

1 plus 1
2 minus 1
3 times 5

block (if, else, while, func): lines seperated with empty line

if (bool [new line] block)

if      1 equals 1
print   they are equals
[new line]

if      1 equals 1
print   they
print   are equals
[new line]

if      VAR1
print   condition is true

if with else block

if      1 equals 2
print   they are equals
else
print   they are not equals

while (bool [newline] block)

while   CONDITION
print   loop
[new line]

COUNTER 5
while   COUNTER greater 1
print   COUNTER
COUNTER COUNTER minus 1
[new line]

func (variable)

func    GREETINGS
write   hello
[new    line]

NUM1    0
NUM2    0

func    SUM_AND_PRINT
SUM     NUM1 plus NUM2
write   Total is SUM

func    RESET
NUM1    0
NUM2    0

call (variable:function)

call    GREETINGS
NUM1    5
NUM2    10
call    SUM_AND_PRINT

func    SUB_CALL
print   the SUM_AND_PRINT func is calling
call    SUM_AND_PRINT
print   resetting all values
call    RESET
[new line]

Design goals

  • No non alphanumeric chars will be used. Characters like & ( ) – [ { } ] : ', ? / * ^> are considered as string.
  • No separator will be used for any reason
  • Tokens must be in a natural language like a "print".

Other Examples

See examples directory for multi language support.

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