Quizalize logo
placeholder image to represent content

JavaScript Syntax

Quiz by Starter quizzes

Feel free to use or edit a copy

includes Teacher and Student dashboards

Measure skills
from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can
  • edit the questions
  • save a copy for later
  • start a class game
  • automatically assign follow-up activities based on students’ scores
  • assign as homework
  • share a link with colleagues
  • print as a bubble sheet

Our brand new solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

New Quizalize solo game modes
16 questions
Show answers
  • Q1
    What keyword is used to declare a variable?

    declare

    const
    var
    function
    30s
  • Q2
    What is the correct syntax for declaring a JavaScript variable?
    var = variableName;
    var variableName;
    variableName = variable;
    variableName = var;
    30s
  • Q3
    Which statement is used to declare a constant in JavaScript?
    constant x = 5;
    const x = 5;
    var x = 5;
    let x = 5;
    30s
  • Q4
    Which of the following is not a JavaScript data type?
    string
    boolean
    float
    number
    30s
  • Q5
    What is the correct way to write a comment in JavaScript?
    / This is a comment
    // This is a comment
    /* This is a comment */
    <!-- This is a comment -->
    30s
  • Q6
    What is the correct way to access the first element of an array?
    myArray(0)
    myArray[0]
    myArray.first
    myArray.first()
    30s
  • Q7
    What is the correct way to add an element to the end of an array?
    myArray[myArray.length] = myElement
    myArray.add(myElement)
    myArray.push(myElement)
    myArray.insert(myElement)
    30s
  • Q8
    What is the difference between == and === in JavaScript?
    == compares values, while === compares values and types
    == and === are equivalent
    == compares types, while === compares values and types
    == compares memory locations, while === compares values and types
    30s
  • Q9
    What is the correct way to write a conditional statement in JavaScript?
    if {} else if {}
    if (condition): {} else: {}
    if (condition) {} else {}
    if then {} else {}
    30s
  • Q10
    What is the correct way to loop through an array in JavaScript?
    foreach (myArray as i) {}
    for (var i = 0; i < myArray.length; i++) {}
    while (i < myArray.length) {}
    for (var i = 1; i <= myArray.length; i++) {}
    30s
  • Q11
    What is the correct way to concatenate two strings in JavaScript?
    myString1 - myString2
    myString1 * myString2
    myString1 + myString2
    myString1 .concat(myString2)
    30s
  • Q12
    What is the correct way to declare a switch statement in JavaScript?
    for (myVariable; myVariable.length; myVariable++) {}
    if (myVariable) {}
    myVariable.switch() {}
    switch (myVariable) {}
    30s
  • Q13
    What is the correct way to write a function in JavaScript?
    function myFunction() {}
    myFunction() {}
    function = myFunction() {}
    function: myFunction() {}
    30s
  • Q14
    How do you write an AND operator in JavaScript?

    |

    &&
    ||
    &
    30s
  • Q15
    How do you write an OR operator in JavaScript?

    &&

    &

    ||

    |
    30s

Teachers give this quiz to your class