While Loop Still Triggering When not Supposed too

Question

Doing a while loop in JavaScript but it's displaying 120 when usernum < 50 but calculating when usernum is 60.

var userNum = 4; // Code will be tested with values: 4, 10 and 60
/* Your solution goes here */
do {
  userNum = 2 * userNum;
  console.log(userNum);
}
while (userNum < 50);

CORRECT Testing displayed output with userNum = 4 Yours 8 16 32 64

CORRECT Testing displayed output with userNum = 10 Yours 20 40 80

INCORRECT Testing displayed output with userNum = 60 Yours and expected differ. See highlights below. Yours 120 Expected Expected no output

while is not the same as do-while.

tkausl
– tkausl

2019-02-18 03:28:11 +00:00
Commented Feb 18, 2019 at 3:28 — tkausl
– tkausl, Commented Feb 18, 2019 at 3:28

5eeker · Accepted Answer · 2019-02-18 03:30:20Z

3

A do while loop runs the code once, and then tests the condition, if it is false, it stops the execution. You should use while or for loop.

while(userNum < 50){
userNum = 2 * userNum;
console.log(userNum);
}

while -> check condition, if true run code, else stop

for -> check condition, if true run code (basically shorter version of while)

do while -> run loop, check condition, if true run again or exit;

edited Feb 18, 2019 at 3:30

answered Feb 18, 2019 at 3:28

5eeker

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1 Comment

5eeker Over a year ago

You got it.. Nice

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