JavaScript: Check the total marks of a student in various examinations

JavaScript Basic: Exercise-38 with Solution

Write a JavaScript program to evaluate a student's total marks across various examinations and determine their grade. The grading criteria are as follows:

• If the total marks fall within the range of 89 to 100 (inclusive), the student receives an A+ grade.
• If the examination is labeled as "Final-exam," the student will receive an A+ grade only if their total marks are 90 or greater. Assume that final examination means we pass 'true' as second parameter otherwise blank.
• If the student achieves an A+ grade, the program should return 'true'; otherwise, it should return 'false'.

Sample Solution:

JavaScript Code:

// Define a function named exam_status with parameters totmarks and is_exam
function exam_status(totmarks, is_exam) {
  // Check if is_exam is truthy (evaluates to true)
  if (is_exam) {
    // Return true if totmarks is greater than or equal to 90
    return totmarks >= 90;
  }

  // Return true if totmarks is between 89 and 100 (inclusive)
  return totmarks >= 89 && totmarks <= 100;
}

// Log the result of calling exam_status with arguments "78" and " " to the console
console.log(exam_status("78", " "));

// Log the result of calling exam_status with arguments "89" and "true " to the console
console.log(exam_status("89", "true "));

// Log the result of calling exam_status with arguments "99" and "true " to the console
console.log(exam_status("99", "true ")); 

Output:

false
false
true

Live Demo:

See the Pen JavaScript: total marks of a student - basic-ex-38 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

// Define a function named exam_status using arrow function syntax with parameters totmarks and is_exam
const exam_status = (totmarks, is_exam) => {
  // Check if is_exam is truthy (equivalent to true)
  if (is_exam) {
    // Return true if totmarks is greater than or equal to 90
    return totmarks >= 90;
  }

  // Return true if totmarks is greater than or equal to 89 and less than or equal to 100
  return totmarks >= 89 && totmarks <= 100;
};

// Log the result of calling exam_status with the arguments "78" and " " to the console
console.log(exam_status("78", " "));

// Log the result of calling exam_status with the arguments "89" and "true " to the console
console.log(exam_status("89", "true "));

// Log the result of calling exam_status with the arguments "99" and "true " to the console
console.log(exam_status("99", "true "));

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