Introduction To Website Development Technologies - JavaScript Arithmetic Operations

The video tutorial covers arithmetic operations in JavaScript, including addition, subtraction, multiplication, and division. It explains how addition can also perform string concatenation, while other operations like multiplication and division behave consistently with numerals and strings. The tutorial also discusses variable assignment and the use of accumulators for shorthand arithmetic operations. Emphasis is placed on maintaining consistency in operations to avoid errors.

What happens when you add a number and a string in JavaScript?

• An error is thrown.

• The string is converted to a number and added.

• The number is converted to a string and concatenated.

• The operation is ignored.

Which symbol is used for multiplication in JavaScript?

• /

• X

• *

• x

How does JavaScript handle division of a string by a number?

• It throws an error.

• It performs the division if the string is numeric.

• It concatenates the string with the number.

• It returns NaN.

Which arithmetic operation behaves differently when dealing with strings in JavaScript?

• Multiplication

• Addition

• Subtraction

• Division

What is the purpose of using a semicolon at the end of a statement in JavaScript?

• All of the above.

• To prevent errors in code execution.

• To separate multiple statements.

• To indicate the end of a line.

What does the '+=' operator do in JavaScript?

• Multiplies a value with a variable and assigns the result back to the same variable.

• Adds a value to a variable and assigns the result to a new variable.

• Adds a value to a variable and assigns the result back to the same variable.

• Subtracts a value from a variable and assigns the result back to the same variable.

How can you multiply a variable by 5 using a shorthand operator in JavaScript?

• variable = variable * 5

• variable =* 5

• variable = 5 * variable

• variable *= 5