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Which of the following is an example of a valid JavaScript variable name?
- a)my-variable
- b)123variable
- c)$variable
- d)function
Correct answer is option 'C'. Can you explain this answer?
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Which of the following is an example of a valid JavaScript variable na...
JavaScript variable names can start with a letter, underscore (_), or a dollar sign ($).
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Which of the following is an example of a valid JavaScript variable na...
Valid JavaScript variable name
JavaScript variable names must follow certain rules to be considered valid. One example of a valid JavaScript variable name is "$variable".
Rules for valid JavaScript variable names:
- Must start with a letter, underscore (_), or dollar sign ($)
- Subsequent characters can be letters, digits, underscores, or dollar signs
- Cannot be a reserved keyword (e.g. function, break, case)
- Cannot contain spaces or special characters other than underscore and dollar sign
Explanation of the valid variable name:
In this case, "$variable" starts with a dollar sign, which is a valid starting character for a variable name in JavaScript. It is followed by the letters "variable", making it a valid variable name according to the rules mentioned above. This variable name can be used in JavaScript code to store and manipulate data.
JavaScript variable names must follow certain rules to be considered valid. One example of a valid JavaScript variable name is "$variable".
Rules for valid JavaScript variable names:
- Must start with a letter, underscore (_), or dollar sign ($)
- Subsequent characters can be letters, digits, underscores, or dollar signs
- Cannot be a reserved keyword (e.g. function, break, case)
- Cannot contain spaces or special characters other than underscore and dollar sign
Explanation of the valid variable name:
In this case, "$variable" starts with a dollar sign, which is a valid starting character for a variable name in JavaScript. It is followed by the letters "variable", making it a valid variable name according to the rules mentioned above. This variable name can be used in JavaScript code to store and manipulate data.
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Which of the following is an example of a valid JavaScript variable name?a)my-variableb)123variablec)$variabled)functionCorrect answer is option 'C'. Can you explain this answer?
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