I am struggling to find the syntax or logic errors in the following 5 (a, b, c,

Question

I am struggling to find the syntax or logic errors in the following 5 (a, b, c, d, & e) problems. Please help me with each one!!! The snippets of JavaScript below contain syntax errors and/or logic errors. Identify the error(s) and insert your corrected code. a. function main() { var num1 = Number(prompt("Enter your first number ")); var num2 = Number(prompt("Enter your second number ")); var result = computeTotal(num1, num2); console.log("The total of your numbers is " + result); } function computeTotal(num1, num2) { return (num1 + num2); } b. function main() var stuName; var stuAge; stuName = getStudentName(stuName); stuAge = getStudentAge(stuAge); console.log("The student name is " + stuName + " and age is " + stuAge); end function function getStudentName(stuName) stuName = prompt("Enter the name of the student"); return stuName; end function function getStudentAge(stuAge) stuAge = prompt("Enter the age of the student"); return stuAge; end function main(); c. function main() { var income = Number(prompt("Enter your monthly income ")); var taxes = computeTaxes(); console.log("The taxes owed on your income is " + taxes); } function computeTaxes(income, taxes) { taxes = income * .20; return taxes; } main(); d. function main() { var income = Number(prompt("Enter your monthly income ")); call displayMonthyIncome(income); } function displayMonthlyIncome(income) { console.log("Your income is " + income); } main(); e. function main() { var total; var val1 = Number(prompt("Enter a number ")); total = computeTotal(total, val1); } function computeTotal(total, val1); { total = total + val1; return total } main();

Explanation / Answer

a.
// call to main() function is missing
function main()
{
   var num1 = Number(prompt("Enter your first number "));
   var num2 = Number(prompt("Enter your second number "));
   var result = computeTotal(num1, num2);
   console.log("The total of your numbers is " + result);
}
function computeTotal(num1, num2)
{
   return (num1 + num2);
}

main();

b.
// syntax for defining a function in java script is wrong
// Body of function should be enclosed in curly braces {}

// removed end function
function main()
{
   var stuName;
   var stuAge;
   stuName = getStudentName(stuName);
   stuAge = getStudentAge(stuAge);
   console.log("The student name is " + stuName + " and age is " + stuAge);
}

function getStudentName(stuName)
{
   stuName = prompt("Enter the name of the student");
   return stuName;
}

function getStudentAge(stuAge)
{
   stuAge = prompt("Enter the age of the student");
   return stuAge;
}

main();

c.
// computeTaxes() function takes two arguments, income and taxes
// declare a variable taxes first and pass it to computeTaxes along with income
function main()
{
   var income = Number(prompt("Enter your monthly income "));
   var taxes;
   taxes = computeTaxes(income, taxes);
   console.log("The taxes owed on your income is " + taxes);
}
function computeTaxes(income, taxes)
{
   taxes = income * .20;
   return taxes;
}
main();

d.
// call is unknown in javscript
// we can directly call a function using its name
function main()
{
   var income = Number(prompt("Enter your monthly income "));
   displayMonthyIncome(income);
}
function displayMonthlyIncome(income)
{
   console.log("Your income is " + income);
}
main();

e.
// total variable is used without initializing
// Any variable has to be initialized with a value before using it
function main()
{
   var total = 0;
   var val1 = Number(prompt("Enter a number "));
   total = computeTotal(total, val1);
   alert("Total is " + total);
}
function computeTotal(total, val1);
{
   total = total + val1;
   return total
}
main();

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.