JavaScript Conditional Statements

JavaScript Conditional Statements - Important Points

6.		Which of the following is not a valid way to declare a variable in JavaScript?

A. var x;

B. let x;

C. const x;

D. int x;

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Answer: option d

Explanation:

int is not a valid keyword for declaring variables in JavaScript. The correct keywords are var, let, and const.

7.		What is the purpose of the switch statement in JavaScript?

A. To declare a new variable

B. To define a loop

C. To execute a block of code based on a condition

D. To assign a value to a variable

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Answer: option c

Explanation:

The switch statement is used to execute a block of code based on a condition. It is often used as an alternative to a series of if statements.

8.		What is the purpose of the ternary operator in JavaScript?

A. To declare a new variable

B. To define a loop

C. To execute a block of code based on a condition

D. To assign a value to a variable

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Answer: option c

Explanation:

The ternary operator is used to execute a block of code based on a condition. It is often used as an alternative to an if statement.

9.		Which of the following is the correct syntax for a ternary operator in JavaScript?

A. condition ? true : false;

B. true : false ? condition;

C. true ? condition : false;

D. condition : true ? false;

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Answer: option a

Explanation:

The correct syntax for a ternary operator in JavaScript is condition ? true : false;. The condition is evaluated, and if it is true, the code block after the ? symbol is executeIf it is false, the code block after the : symbol is executed.

10.		What is the syntax of the if statement in JavaScript?

A. if (condition) {code block}

B. if {code block} (condition)

C. (condition) if {code block}

D. {code block} if (condition)

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Answer: option a

Explanation:

The if statement in JavaScript starts with the keyword 'if' followed by a condition in parentheses, and then a code block enclosed in curly braces.

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JavaScript Conditional Statements

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