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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Refactor Using a Loop

Amber Kuo
Amber Kuo
1,390 Points
Posted by Amber Kuo
Amber Kuo
1,390 Points

How do numbers work in a loop counter?

For this challenge, in order to log on the console even numbers from 2-24, a for loop is used. How does the numbering here work? Why is it- for (i = 2; i < 25; i += 2);

and not- for (i=0; i ≤ 24; i += 2);

??

2 Answers

dragos busuioc
dragos busuioc
24,908 Points
dragos busuioc
dragos busuioc
24,908 Points

for (i=0; i ≤ 24; i += 2); start the iteration from 0,so will console log even 0, and the chalenge is to console log the numbers from 2 to 24,not from 0 to 24

Tobiasz Gala
seal-mask
.a{fill-rule:evenodd;}techdegree
Tobiasz Gala
Full Stack JavaScript Techdegree Student 23,529 Points
Tobiasz Gala
.a{fill-rule:evenodd;}techdegree
Tobiasz Gala
Full Stack JavaScript Techdegree Student 23,529 Points 
 i = 0 // first you declare variable which is used as a counter
i <= 24 // you add condition so if i is less or equal to 24 loop will run
i += 2 // you tell for loop what to do when each loop ends... you increase value of i by 2

i +2 is the same as i = i + 2

In the challenge they ask for even number so the counter must start with the first even number which is 2