JavaScript Variable Manipulation Concepts

This video tutorial covers basic math operations in JavaScript using arithmetic operators. It explains how to perform addition, subtraction, multiplication, division, exponents, and modulus operations. The tutorial also discusses incrementing and decrementing variables, using constants, and provides an example of creating a simple calculator program to sum two integers.

What is the primary purpose of using arithmetic operators in JavaScript?

• To handle file operations

• To manage user input

• To create complex data structures

• To perform basic math operations on numeric values

Which operator is used for addition in JavaScript?

• Plus sign (+)

• Slash (/)

• Asterisk (*)

• Minus sign (-)

How do you represent exponents in JavaScript?

• Using a single asterisk (*)

• Using a double slash (//)

• Using two asterisks (**)

• Using a caret (^)

What does the modulus operator (%) return?

• The product of two numbers

• The quotient of two numbers

• The remainder of dividing two numbers

• The sum of two numbers

If 17 % 5 equals 2, what does this tell us?

• 5 fits into 17 once with a remainder of 2

• 5 fits into 17 two times with a remainder of 2

• 5 fits into 17 four times with a remainder of 2

• 5 fits into 17 three times with a remainder of 2

What is the shorthand for incrementing a variable by 1 in JavaScript?

• variable = variable + 1

• variable =+ 1

• variable++

• variable += 1

How can you decrease a variable by 1 using shorthand in JavaScript?

• variable =- 1

• variable--

• variable -= 1

• variable = variable - 1

What is the shorthand for adding a value y to a variable x?

• x += y

• x =+ y

• x = y + x

• x = x + y

What is a constant in programming?

• A variable that can change its value

• A variable that cannot be changed once assigned

• A function that performs calculations

• A loop that runs indefinitely

How do you declare a constant in JavaScript?

• Using the const keyword

• Using the static keyword

• Using the let keyword

• Using the var keyword