Can a for loop increment decrement by more than one

Question

Are there other ways to increment a for loop in Javascript besides i   and   i  For example  I want to increment by 3 instead of one    for  var i   0  i  lt  myVar length  i 3         every three

User · Answer

The last part of the ternary operator allows you to specify the increment step size. For instance, i++ means increment by 1. i+=2 is same as i=i+2,... etc. Example:

let val= [];

for (let i = 0; i < 9; i+=2) {
  val = val + i+",";
}


console.log(val);

Expected results: "2,4,6,8"

'i' can be any floating point or whole number depending on the desired step size.

User · Answer

for  var i   0  i  lt  10  i   i   2           code here

User · Answer

There is an operator just for this  For example  if I wanted to change a variable i by 3 then   x000D   x000D  var someValue   9  var Increment    3  for var i 0 i lt someValue i  Increment     do whatever   x000D   x000D   x000D   to decrease  you use -   x000D   x000D  var someValue   3  var Increment    3  for var i 9 i gt someValue i  Increment     do whatever   x000D   x000D   x000D

User · Answer

You certainly can  Others have pointed out correctly that you need to do i    3  You can t do what you have posted because all you are doing here is adding i   3 but never assigning the result back to i  i   is just a shorthand for i   i   1  similarly i   3 is a shorthand for i   i   3

User · Answer

A for loop   for INIT  TEST  ADVANCE        BODY     Means the following   INIT  while  true        if   TEST          break      BODY      ADVANCE      You can write almost any expression for INIT  TEST  ADVANCE  and BODY   Do note that the    operators and variants are operators with side-effects  one should try to avoid them if you are not using them like i  1 and the like       i means i  1  return i i   means oldI i  i  1  return oldI   Example    gt  i 0  gt   i    i    i  i  i--  i  --i  i   0  1  2  2  2  1  0  0

User · Answer

Use the    assignment operator   for  var i   0  i  lt  myVar length  i    3      Technically  you can place any expression you d like in the final expression of the for loop  but it is typically used to update the counter variable   For more information about each step of the for loop  check out the MDN article

User · Answer

for  var i   0  i  lt  myVar length  i  3         every three     additional   Operator   Example    Same As            X           x   x   1   --       X --        x   x - 1            x    y      x   x   y   -        x -  y      x   x - y            x    y      x   x   y            x    y      x   x   y            x    y      x   x   y

User · Answer

Andrew Whitaker s answer is true  but you can use any expression for any part  Just remember the second  middle  expression should evaluate so it can be compared to a boolean true or false   When I use a for loop  I think of it as  for  var i   0  i  lt  10    i           expression        as being  var i   0  while  i  lt  10            expression          i

[javascript] Can a for loop increment/decrement by more than one?

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