YENGconstant

constant allows to define a constant value that is evaluated and all its occurrences in code are replaced by that value at compile time.

Make sure to add yoptions; to the second line of the script, usually line number 1 starting from 0.

Its type will be guessed from the types at right side expression, and can be confusing

constant endlimit = 0.1 // will be a like float 0.1
constant start = 1 // will be a like integer 1
constant idea = 2 + 3 // will be like integer 5
constant betteridea = idea + 3 // will be like integer 8
constant otheridea = 2 + 3.0 // will be like float 5.0
constant badidea = "2" + 3 // will be like string "23"

Other operations supported

& | ^ ~ for integer types
- * / % for integer or float types

On expressions better use () to force and make clear the desired evaluation order

constant ar = 2 + (2 & 1); //will be 2
constant ar = 2 + 2 & 1; //will be 0, ie will do (2 + 2) & 1 since + and & have same evaluation priority.

Simple normal use will be to define a simple constant at top of program, easy to change later.

constant textureID = "0d3b69fe-1b6e-40f3-8e5f-933814df3b7b";

Saving the memory of a global variable.