What does the sign mean in python
It's an operator in Python that can mean several things depending on the context. A lot of what follows was already mentioned (or hinted at) in the other answers but I thought it could be helpful to provide a more extensive summary. % for Numbers: Modulo operation / Remainder / RestThe percentage sign is an operator in Python. It's described as:
So it gives you the remainder/rest that remains if you "floor divide" x by y. Generally (at least in Python) given a number
For example if you divide 5 by 2:
In general you use the modulo operation to test if a number divides evenly by another number, that's because multiples of a number modulo that number returns 0:
That's how it's used in your example, it cannot be a prime if it's a multiple of another number (except for itself and one), that's what this does:
If you feel that
Instead of
Similar to that it's often used to determine if a number is "odd" or "even":
And in some cases it's also used for array/list indexing when wrap-around (cycling) behavior is wanted, then you just modulo the "index" by the "length of the array" to achieve that:
Note that there is also a function for this operator in the standard library
But there is also the augmented assignment
% for strings: printf-style String FormattingFor strings the meaning is completely different, there it's one way (in my opinion the most limited and ugly) for doing string formatting:
Here the Note that there are much better (probably opinion-based) ways to format strings:
% in Jupyter/IPython: magic commandsTo quote the docs:
This is regularly used in Jupyter notebooks and similar:
The % operator on arrays (in the NumPy / Pandas ecosystem)The
Customizing the % operator for your own classesOf course you can customize how your own classes work when the Just to provide a simple example that shows how it works:
This example isn't really useful, it just prints and then delegates the operator to the stored value, but it shows that
Note that it also works for
However you could also implement
Now
What does '/' mean in Python?In Python, you use the double slash // operator to perform floor division. This // operator divides the first number by the second number and rounds the result down to the nearest integer (or whole number).
What does %s mean in Python?The %s operator is put where the string is to be specified. The number of values you want to append to a string should be equivalent to the number specified in parentheses after the % operator at the end of the string value.
What does >> mean in Python?In Python >> is called right shift operator. It is a bitwise operator. It requires a bitwise representation of object as first operand. Bits are shifted to right by number of bits stipulated by second operand. Leading bits as towards left as a result of shifting are set to 0.
What does %d mean in Python?What does %d do in Python? The %d operator is used as a placeholder to specify integer values, decimals, or numbers. It allows us to print numbers within strings or other values. The %d operator is put where the integer is to be specified. Floating-point numbers are converted automatically to decimal values.
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