how can i use variables as katex functions?

[xed3x]

hi. just one question.
how can i use in

katex.render("a + b = c", symbole_40d);

some variables like

var a = 2
var b = 4
var c = 0
katex.render("{$a} + {$b} = {$c}", symbole_40d);
console.log('c=' + c) //Output: c=6

in that kind of meaning. i know it would not works, but for that try to represent that what i need i think its ok as symbolic code :D. big thx

[edemaine]

Here are a few ways:

1. using template literals:

   katex.render(`${a} + ${b} = ${c}`, symbole_40d);

2. Using + operator on strings, like you did in the console.log call:

   katex.render(a + ' + ' + b + ' = ' + c, symbole_40d);

3. Using KaTeX macros:

   katex.render("\\a + \\b = \\c", symbole_40d, {
     macros: {
       "\\a": a,
       "\\b": b,
       "\\c": c,
     }
   });

   (Note that this overrides the default meaning of \c (a type of accent). It might be better to call the macro something else.)

[xed3x]

big thx!