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Keshav Jindal
Keshav Jindal

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How to declare a good variable name in programming.

1.What is a variable
A variable can be a empty container in which we can store some data.

2.Points to remember while declaring a variable

  • The variable name may start with a underscore or a letter.
  • It can not start with a digit or a symbol. For example-7,4,%,!,?,etc.

  • Variable can only contain letters, underscores, or a digit after a digit. For example-a=10
    a_2=12,etc.
    3.Examples
    1.

num1_list1=['science', 'history', 'mathematics']
print(num1_list1)
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Output:
['science', 'history', 'mathematics']

2.

_123=("dev community")
print(_123)
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Output:
dev community

3.

foo="Hello"
print(foo)
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Output:
Hello

4.

my_tuple = (1, 2, 3, 4)
print (len(my_tuple))
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Output:
4

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