Which of the following variable names is valid in Python?
2ndChance
Second chance
secondch@nce
second_chance
second_chance
To determine which of the following variable names is valid in Python, we need to consider the rules and conventions for variable naming in the language.
In Python, variable names must adhere to the following rules:
1. Variable names can only contain letters (a-zA-Z), digits (0-9), and underscores (_).
2. Variable names must start with a letter or an underscore (_). They cannot start with a digit.
3. Variable names are case-sensitive, meaning "name" and "Name" are considered different variables.
Now let's evaluate each of the given options:
1. 2ndChance: This variable name starts with a digit, which is not allowed. Therefore, it is not a valid variable name in Python.
2. Second chance: This variable name contains a space, which is not allowed. Variable names in Python cannot contain spaces. Therefore, it is not a valid variable name.
3. secondch@nce: This variable name contains a special character (@), which is not allowed. Variable names in Python can only contain letters, digits, and underscores. Therefore, it is not a valid variable name.
4. second_chance: This variable name meets all the requirements for a valid Python variable name. It starts with a lowercase letter, contains only letters, digits, and underscores, and does not violate any of the rules mentioned above. Therefore, it is a valid variable name in Python.
Valid variable name: second_chance
In Python, valid variable names must follow certain rules:
1. They must start with a letter (a-z, A-Z) or an underscore (_).
2. The rest of the variable name can consist of letters, numbers (0-9), and underscores.
3. Variable names are case-sensitive.
Based on these rules, the valid variable name in Python among the options you provided is:
second_chance