javascript - simple modulo not returning list of values I expected -

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i thought following list numbers 0 21 divisible 7, i.e. 7, 14, , 21. instead returns 22. why? 

for (var = 0; <= 21; i++) {     if (i % 7 === 0); } console.log(i);

btw, have no programming background , i'm struggling first language under belt. teeny tiny details doing me in. anyway, helping me see how placement of console.log affected result.

because don't print in loop, final value of i.


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