javascript - for loop variable expressions mathematical manipulating -

i'm writing program in js , im feeling i'm repeating code, not good. i'm trying avoid if else block has 2 similar for loop , re-write without if else using 1 for loop.

consider this: minimum has value 0. maximum has value 10. if new_value less old_value wanna execute loop minimum to new_value, else wanna execute maximum downto new_value

lets see in action, lets javascript (language-agnostic answers welcome , upvoted -but not grant cookie)

var minimum = 0; var maximum = 10; var old_value = 5; /* var new_value = taken user input whatever ... */  if(new_value<old_value) {     for(i=minimum;i<new_value;i++)     {         // whatever     } } else {     for(i=maximum;i>new_value;i--)     {         // whatever     } } 

i have feeling these 2 for loops similar enough written 1 in mathematical approach maybe. have tried bit using absolute values math.abs() math.max.apply() had no luck.

i don't want set other helping variables using if else give appropriate values.

so, whats question: i'm wondering if can rewritten in 1 for ... loop without being nested in if else.

a complete solution using built-in js functions will grant cookie.

edit: didn't see original thing not using if/else variables. why not then? go 0 10, using value or 10 minus value depending on conditional.

for(var j = 0; j <= 10; j++) {     var = new_value < old_value ? j : 10 - j;      // whatever } 

assign min, max , increment variables, define them based on if condition , use them in loop:

var old_value = 5, start, end, inc;  if(new_value<old_value) {     start = 0;     end = 10;     inc = 1; } else {     start = 10;     end = 0;     inc = -1; }  for( = start;i >= start && <= end; += inc) {     // whatever }