A loop variable in Javascript is a function that iterates

Question

A loop variable in Javascript is a function that iterates

var x = 99;
while (true)
{
  function lyrics(person)
  {
    return x + " " + "lines of code in the file " + x + " " + person + (x-1) + " lines of code" + "!";
  }
    

  console.log(lyrics("John strikes one out, clears it all out ;"));
  x -= 1;
  if (x == 0)
  {
    break;
  }
}

I need help with my coding logic. Also, please advise me if there are any mistakes in my function. I keep getting a NaN error when running it with (x-1). I want it to display 99 lines of code in the file, 99 lines of code John strikes one out, clears it all out, 98 lines of code in the file.

Please bear with me as I am new to this.

javascript function loops

Answer 1

Answer №1

It appears the issue lies in attempting to subtract one from a string value, which results in NaN (not-a-number) since subtraction requires numerical operands.

To rectify this problem, ensuring proper evaluation by encapsulating i-1 in parentheses can resolve the issue:

i + " " + "lines of code in the file " + i + " " + him + (i-1) + " lines of code" + "!"

An alternate and more visually appealing method is utilizing backticks for improved readability:

`${i} lines of code in the file ${i} ${him+(i-1)} lines of code!`

If uncertain about the structure, running the below snippet provides further insight into what transpired:

let i = 99
let x = "hello"
console.log("i-1", i - 1)         // Correct as i is numeric
console.log("x-1", x - 1)         // Results in NaN due to subtracting from string
console.log("x+i-1", x + i - 1)   // Still NaN as "x+i" forms a string
console.log("x+(i-1)", x + (i-1)) // Works correctly with added parentheses

Answer 2

It appears the issue lies in attempting to subtract one from a string value, which results in NaN (not-a-number) since subtraction requires numerical operands.

To rectify this problem, ensuring proper evaluation by encapsulating i-1 in parentheses can resolve the issue:

i + " " + "lines of code in the file " + i + " " + him + (i-1) + " lines of code" + "!"

An alternate and more visually appealing method is utilizing backticks for improved readability:

`${i} lines of code in the file ${i} ${him+(i-1)} lines of code!`

If uncertain about the structure, running the below snippet provides further insight into what transpired:

let i = 99
let x = "hello"
console.log("i-1", i - 1)         // Correct as i is numeric
console.log("x-1", x - 1)         // Results in NaN due to subtracting from string
console.log("x+i-1", x + i - 1)   // Still NaN as "x+i" forms a string
console.log("x+(i-1)", x + (i-1)) // Works correctly with added parentheses

Answer 3

Answer №2

let num = 99;
function singLines(name)
{
   return num + " lines of code in the file " + num + " " + name + --num + " lines of code!";
   
}

while (true)
{
   console.log(singLines("John strikes one out, clears it all out; "));
   if (!num)
   {
         break;
   }
}

This is my approach to solving this problem, it may be a bit lengthy but follows the same principle.

Answer 4

let num = 99;
function singLines(name)
{
   return num + " lines of code in the file " + num + " " + name + --num + " lines of code!";
   
}

while (true)
{
   console.log(singLines("John strikes one out, clears it all out; "));
   if (!num)
   {
         break;
   }
}

This is my approach to solving this problem, it may be a bit lengthy but follows the same principle.

Answer 5

Answer №3

Before diving into the coding process, it's important to choose the right iteration structure for your specific scenario:

If you already know the fixed number of iterations, opt for a for loop.
When dealing with an array as input, consider using a foreach iterator, although a for loop can be more versatile.
For situations requiring iteration until a certain condition is met, use a while loop.
If you need to perform an action first before iterating, the do structure is ideal.

In your case, where the number of iterations is known, a simple for loop would suffice:

for (let i = 0; i < 99; i++) {
    console.log(i + " lines of code in the file " + i + " " + him + i-1 + "lines of code" + "!");
}

Remember to declare functions outside the loop to avoid unnecessary redundancy, and prioritize code readability for easier understanding of your program's intent.

Answer 6

Before diving into the coding process, it's important to choose the right iteration structure for your specific scenario:

If you already know the fixed number of iterations, opt for a for loop.
When dealing with an array as input, consider using a foreach iterator, although a for loop can be more versatile.
For situations requiring iteration until a certain condition is met, use a while loop.
If you need to perform an action first before iterating, the do structure is ideal.

In your case, where the number of iterations is known, a simple for loop would suffice:

for (let i = 0; i < 99; i++) {
    console.log(i + " lines of code in the file " + i + " " + him + i-1 + "lines of code" + "!");
}

Remember to declare functions outside the loop to avoid unnecessary redundancy, and prioritize code readability for easier understanding of your program's intent.

A loop variable in Javascript is a function that iterates

Answer №1

Answer №2

Answer №3

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