Score calculation

Write the score calculation logic.

Score calculation logic

Score calculation is the process of finding the number of correct answers. Each answer's result is collected in a boolean array; then the true values in this array are counted. A counter variable is incremented with a for...of loop to find the total.

function calculateScore(results: boolean[]): number {
  let score = 0;
  for (const r of results) {
    if (r) score++;
  }
  return score;
}

Counter increment

While calculating the score, the counter is incremented by one when a correct answer is found. The skor++ expression is used; this is the same as skor = skor + 1. At the end of the loop the counter value gives the total number of correct answers.

let score = 0;
if (correct) score++;
// same as score = score + 1

Exercise skorHesapla function

Define a skorHesapla function: (sonuclar: boolean[]): number. In its body, start skor at 0, loop over sonuclar with for...of; do skor++ on each true value and finally return skor. Print the result of calling skorHesapla([true, false, true]) with console.log.

Show example solution

function skorHesapla(sonuclar: boolean[]): number {
  let skor = 0;
  for (const s of sonuclar) {
    if (s) skor++;
  }
  return skor;
}
console.log(skorHesapla([true, false, true]));

Test yourself

What type of parameter does the score calculation function take?
- Soru[]
- string
- number
- boolean[]
Show answer

boolean[] — Score calculation takes a boolean[] array containing the correct/wrong result of each question and returns a number.

Increment counter by one

let skor = 0;
if (dogru) skor____;

Show answer

let skor = 0;
if (dogru) skor++;

Score calculation concepts

boolean[]

Results array
for...of

Loop structure
skor++

Counter increment
number

Return type

Next lesson: Integration

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