How is console.log() used to display variable values in the console? | JavaScript | MYTAT

Q

How is console.log() used to display variable values in the console?

A). By concatenating variables with strings. B). By using special escape characters. C). By including variables directly in the parentheses. D). By using HTML tags.

Answer & Solution

Answer: Option Option C

Solution:

console.log() is used to display variable values in the console by including variables directly in the parentheses, separated by commas. For example, var name = 'John'; console.log('Name:', name); will log 'Name: John' to the console. Using special escape characters or concatenation with strings is not necessary in console.log() for displaying variable values, as the method automatically converts variables and expressions into strings for logging. HTML tags are not used in console.log() as it is specifically designed for logging text-based information to the console.

Related Questions on Average

Which method can be used to log warning messages in JavaScript?

A). console.debug()

B). console.info()

C). console.warn()

D). console.error()

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What type of information can be logged using console.log() in JavaScript?

A). Only strings and text-based data.

B). Strings, numbers, objects, arrays, and other data types.

C). Numbers and mathematical calculations.

D). Images and multimedia content.

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What does console.log() output when logging an undefined variable?

A). An empty string.

B). 'undefined'

C). null

D). An error message.

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How can you log formatted messages with variable values using console.log()?

A). By using special symbols like %s and %d in the message string.

B). By enclosing expressions in backticks (`) within the message.

C). By concatenating variables directly in the parentheses.

D). By assigning expressions to separate log methods.

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How does console.log() handle logging complex data structures like objects or arrays?

A). It prints the memory address of the data structure.

B). It converts objects and arrays into readable string representations.

C). It displays an error message for complex data structures.

D). It ignores complex data structures and logs a warning.

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How does console.log() handle logging objects with nested properties?

A). It prints only the top-level properties of the object.

B). It converts the object and all nested properties into string representations.

C). It displays an error message for objects with nested properties.

D). It ignores nested properties and logs the object structure only.

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What is the primary purpose of console.log() in JavaScript?

A). To display messages on the webpage.

B). To log information to the browser's console.

C). To prompt user input.

D). To create interactive elements.

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What is the behavior of console.log() when logging null or empty values?

A). It logs an empty string for null values and does not log empty values.

B). It logs 'null' or 'undefined' for null or empty values, respectively.

C). It ignores null or empty values and logs the rest of the message.

D). It displays an error message for null or empty values.

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How can you log multiple values or messages using console.log()?

A). By using separate console.log() statements for each value.

B). By concatenating values within the parentheses.

C). By using HTML tags in the message string.

D). By separating values with commas within the parentheses.

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Which approach is recommended for logging sensitive data using console.log()?

A). Use console.warn() instead of console.log().

B). Use console.log() with encryption algorithms.

C). Avoid logging sensitive data altogether.

D). Use console.error() instead of console.log().

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