Summary  
This chapter demonstrates how to combine loops and conditional checks to filter elements in an array and count how many meet a given criterion.

General domain of usage  
Education (student exam score evaluation)

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.

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);

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);

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

A clear, interactive introduction to program logic in JavaScript. This course explains how decisions, conditions, and loops shape the way programs run, using relatable examples and hands-on practice. Build the foundation for writing flexible, efficient, and readable code that truly responds to logic.

Discover how programs make choices and control what happens next. Explore the logic behind decision-making, from simple if statements to multiple-choice scenarios using else and switch structures.

Understand how operators and loops shape the flow of your programs. Work with comparison and logical operators to create precise conditions, and use different loop types to repeat actions efficiently.

Put decision-making and repetition together to solve real problems with clarity and efficiency. Strengthen your coding habits with best practices that make logic easier to read, maintain, and debug.

Filtering and Counting with Loops

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.

Filtering and Counting with Loops