Quoted ValueIn normal case, when you specify expressions in the argument list of function call, their evaluation results are passed to a function. However, if the function specify an argument symbol prefixed with a backquote character in its declaration, a pre-evaluated expression shall be passed to the function as a Quoted value. The following example creates a function that works just like for statement in C language. c_like_for(`init, `cond, `next) {`block} = { env = outers() env.eval(init) while (env.eval(cond)) { env.eval(block) env.eval(next) } } n = 0 c_like_for (i = 1, i <= 10, i += 1) { n += i } printf('i = %d, sum = %d\n', i, n) |