Lære Filtering and Counting with Loops | Applying Logic and Writing Clean Code

Combining loops and conditions is a powerful way to process data in JavaScript. Imagine you have a list of student exam scores, and you want to know how many students passed. You can use a loop to go through each score, and a condition to check if it meets the passing standard. For instance, if the passing score is 60, you would count every score that is 60 or higher.


              12345678910
            
const scores = [75, 42, 89, 55, 63, 48, 91, 60];
let passCount = 0;

for (let i = 0; i < scores.length; i++) {
  if (scores[i] >= 60) {
    passCount++;
  }
}

console.log("Number of students who passed: " + passCount);


              12345678910
            
const scores = [75, 42, 89, 55, 63, 48, 91, 60];
let passCount = 0;

scores.forEach(function(score) {
  if (score >= 60) {
    passCount++;
  }
});

console.log("Number of students who passed: " + passCount);

1. Where should you place the condition to check if a score is passing when counting inside a loop?

2. Fill in the blank with the correct condition to count how many numbers in the array are even.

Var alt klart?

Tak for dine kommentarer!

Sektion 3. Kapitel 1

Spørg AI

Spørg om hvad som helst eller prøv et af de foreslåede spørgsmål for at starte vores chat

Awesome!

Completion rate improved to 7.69

Stryg for at vise menuen


              12345678910
            
const scores = [75, 42, 89, 55, 63, 48, 91, 60];
let passCount = 0;

for (let i = 0; i < scores.length; i++) {
  if (scores[i] >= 60) {
    passCount++;
  }
}

console.log("Number of students who passed: " + passCount);


              12345678910
            
const scores = [75, 42, 89, 55, 63, 48, 91, 60];
let passCount = 0;

scores.forEach(function(score) {
  if (score >= 60) {
    passCount++;
  }
});

console.log("Number of students who passed: " + passCount);

1. Where should you place the condition to check if a score is passing when counting inside a loop?

2. Fill in the blank with the correct condition to count how many numbers in the array are even.

Var alt klart?

Tak for dine kommentarer!

Sektion 3. Kapitel 1