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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops A Closer Look at Loop Conditions

Posted by Ran Wang
.a{fill-rule:evenodd;}techdegree seal-36
Ran Wang
Full Stack JavaScript Techdegree Graduate 32,191 Points

Replace the "guess" in the while condition with the call of function?

Other parts being the same, why my browser ran into endless loop when I replace the 'guess' with getRandomNumber(upper)'?

˜˜˜ while (getRandomNumber(upper) !== randomNumber) { getRandomNumber(upper); attemps += 1; }

˜˜˜ my idea is to call the function and it will each time return a value, if this value does not equal to the randomNumber, then call the function to run again in the loop.

For me, the above code seems logical, but the browser told me no.

3 Answers

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

It would help to see your whole code, this part doesn't look like it would cause your issue.

But you can remove the 2nd call to "getRandomNumber", it doesn't really do anything now that "guess" has been removed except slow things down.

If you still have an issue please post the complete code. And the three marks that would indicate code for formatting are accents ("back-ticks").

Ran Wang
.a{fill-rule:evenodd;}techdegree seal-36
Ran Wang
Full Stack JavaScript Techdegree Graduate 32,191 Points

thank you for your help, my whole code is as follows:

var upper = 100000;
var randomNumber = Math.floor(Math.random()*upper)+1;
var countGuess = 0;
var guess;

function GetRandomNumber(upper) {
  return Math.floor(Math.random()*upper)+1;
}

while (GetRandomNumber(upper) !== randomNumber) {
  GetRandomNumber(upper);
  countGuess+=1;
}

document.write("The number is " + randomNumber + ", it took me " + countGuess + " times to guess it out.");
Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

I still don't see anything wrong. When I tried the code, I got this response:

The number is 58577, it took me 180246 times to guess it out.

Removing the redundant call speeds it up but doesn't affect the final result.

Ran Wang
.a{fill-rule:evenodd;}techdegree seal-36
Ran Wang
Full Stack JavaScript Techdegree Graduate 32,191 Points

Thank you for the help with the code and the post-coloring tops XD !

Ran Wang
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Ran Wang
Full Stack JavaScript Techdegree Graduate 32,191 Points
Ran Wang
.a{fill-rule:evenodd;}techdegree seal-36
Ran Wang
Full Stack JavaScript Techdegree Graduate 32,191 Points

test

print ("hello world");
Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

FYI: You can get syntax coloring if you add "js" to the first set of ticks. :point_right: ```js

Jeff Sanders
PLUS
Jeff Sanders
Courses Plus Student 9,503 Points
Jeff Sanders
Jeff Sanders
Courses Plus Student 9,503 Points

There are in fact some major problems with this code.

  1. your var guess does nothing
  2. the GetRandomNumber call within the while loop is unnecessary because you aren't storing that value anywhere
  3. you aren't storing the computer's guess anywhere, so the program is very limited. For example, you couldn't analyze each guess if that became a requirement later on down the line