What is the difference between %i and %d in Python?

Python copied the C formatting instructions.

For output, %i and %d are the exact same thing, both in Python and in C.

The difference lies in what these do when you use them to parse input, in C by using the scanf() function. See Difference between format specifiers %i and %d in printf.

Python doesnt have a scanf equivalent, but the Python string formatting operations retained the two options to remain compatible with C.

The new str.format() and format() format specification mini-language dropped support for i and stuck with d only.

No difference.

The reason why there are two is that, %i is just an alternative to %d ,if you want to look at it at a high level (from python point of view).

Heres what python.org has to say about %i: Signed integer decimal.

And %d: Signed integer decimal.

%d stands for decimal and %i for integer.

but both are same, you can use both.