How do I make it calculate the variable maxK inbetween both input arguments?

How do I make it calculate the variable maxK in between both input arguments:

clear;
close all;
clc;

N = input('Gamemode [4/5/6+]: ');
maxK = (N^2 + 5*N + 6) / 2;          % <======= This variable, so it can be used in the K input request
K = input(['Starting pieces [max.' maxK ']: ']);

Answer 1

[Kamil Antos]

input([sprintf('Starting pieces [max.%i]: ', maxK)])

[The Legend]

thanks man

Answer 2

[Steven Lord]

If you're using release R2016b or later of MATLAB, you can use string. If you're using release R2017a or later you can define the string arrays that make up most of your message using double quotes.

K = input("Starting pieces [max." + maxK + "]: ");