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JavaScript Statements - Advanced Web Programming Lab

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JavaScript Statements - Advanced Web Programming Lab

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Questions and Answers

How do you declare a variable in JavaScript?

Using the 'let' keyword

Using the 'var' keyword

Using the 'const' keyword

All of the above (correct)

What is the purpose of the 'typeof' operator in JavaScript?

To check the data type of a variable (correct)

To check if a variable is null

To check if a variable is a string

To check if a variable is undefined

What is the output of the expression '10 + '5' in JavaScript?

55 (correct)

Error

105

How do you create a JavaScript object?

Using the '{}' syntax Signup and view all the answers

What is the purpose of the 'parseInt' function in JavaScript?

To convert a string to a number Signup and view all the answers

What is the output of the expression 'true ? 1 : 2' in JavaScript?

1 Signup and view all the answers

How do you create a JavaScript function?

Using the 'function' keyword Signup and view all the answers

What is the purpose of the 'Math.random' function in JavaScript?

To generate a random number between 0 and 1 Signup and view all the answers

How do you convert a string to uppercase in JavaScript?

Using the 'toUpperCase' method Signup and view all the answers

What is the purpose of the 'if' statement in JavaScript?

To execute a block of code if a condition is true Signup and view all the answers