Variable and Value
Python Variable Name Rules
Good Variable Name
Python Assignment StatementsThe assignment statement creates new variables and gives them values. Basic assignment statement in Python is : Show
Syntax: <variable> = <expr> Where the equal sign (=) is used to assign value (right side) to a variable name (left side). See the following statements :
One thing is important, assignment statement read right to left only. Example: a = 12 is correct, but 12 = a does not make sense to Python, which creates a syntax error. Check it in Python Shell.
Multiple AssignmentThe basic assignment statement works for a single variable and a single expression. You can also assign a single value to more than one variables simultaneously. Syntax: var1=var2=var3...varn= = <expr> Example: x = y = z = 1 Now check the individual value in Python Shell.
Here is an another assignment statement where the variables assign many values at the same time. Syntax: <var>, <var>, ..., <var> = <expr>, <expr>, ..., <expr> Example: x, y, z = 1, 2, "abcd" In the above example x, y and z simultaneously get the new values 1, 2 and "abcd".
You can reuse variable names by simply assigning a new value to them :
Other ways to define value
Output: 5000000
Output: 0.35
Output: 10000.0 Swap variablesPython swap values in a single line and this applies to all objects in python. Syntax: var1, var2 = var2, var1 Example:
Local and global variables in PythonIn Python, variables that are only referenced inside a function are implicitly global. If a variable is assigned a value anywhere within the function’s body, it’s assumed to be a local unless explicitly declared as global. Example:
Output: In side func1() var1 = PHP In side func2() var1 = Python You can use a global variable in other functions by declaring it as global keyword : Example:
Output: In side func1() var1 = PHP In side func2() var1 = PHP Previous: Python Syntax Test your Python skills with w3resource's quiz Python: Tips of the DayNaming and saving slices of iterables: # Naming slices (slice(start, end, step)) >>> a = [0, 1, 2, 3, 4, 5] >>> LASTTHREE = slice(-3, None) >>> LASTTHREE slice(-3, None, None) >>> a[LASTTHREE] [3, 4, 5] What are the 3 variables in Python?Python Numbers. int (signed integers). float (floating point real values). complex (complex numbers). What are variables in Python programming language?A Python variable is a reserved memory location to store values. In other words, a variable in a python program gives data to the computer for processing. Every value in Python has a datatype. Different data types in Python are Numbers, List, Tuple, Strings, Dictionary, etc.
What is variable and types of variables in Python?Variables are nothing but reserved memory locations to store certain values. This means that when you create a variable you reserve some space in memory. Based on the data type of a variable, the interpreter allocates memory and decides what can be stored in the reserved memory.
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