Difference between %d and %f?

Question

xxtan1 2020-8-3

编辑： Adam Danz 2020-8-4

Hi, I dont quite understand the difference between %d and %f and its usage in certain cases.

Does %d correspond to int in C and %f correspond to float?

What is the case I have to use %d instead of %f?

Answer 1

Adam Danz 2020-8-3

编辑：Adam Danz 2020-8-4

Refer to the documentation.

%d represents signed integers (base 10).

sprintf('John is %d years old', 7)
% 'John is 7 years old'

%f represents floating point numbers.

sprintf('The first 8 dp of pi are %.8f', pi)
%  'The first 8 dp of pi are 3.14159265'

%f can also be used to represent integers by rounding floating point inputs. %d cannot be used in this way.

sprintf('Pi is rounded to %.0f', pi)
% 'Pi is rounded to 3'
sprintf('Pi is rounded to %.d', pi)
% 'Pi is rounded to 3e+00'