How to display pi symbol in the output?

how to display pi symbol instead of numerical value in the out of the given code

clc; clear all; close all;
nA=3.3;nB=2.25;
% nB=3.3;nA=2.25;
S=sign(1-(nA^2/nB^2));
x=-1i*log(S);
if x>0
    disp('Zak Phase of 0th band = ')
    disp(pi)
else
    disp('Zak Phase of 0th band = ')
    disp('0')
end

Zak Phase of 0th band = 

    3.1416

[Fangjun Jiang]

sprintf('\x3c0')

ans = 'π'

double('π')

ans = 960

Answer 1

[Dyuman Joshi]

You can either use the symbolic math toolbox or print the symbol via the unicode value -

nA=3.3;nB=2.25;
% nB=3.3;nA=2.25;
S=sign(1-(nA^2/nB^2));
x=-1i*log(S);
if x>0
    disp('Zak Phase of 0th band = ')
    %pi as a symbolic number
    disp(sym(pi))
    %print the symbol via unicode value
    fprintf('%c', 960)
else
    disp('Zak Phase of 0th band = ')
    disp('0')
end

Zak Phase of 0th band = 

π

π

Answer 2

[Nathan Hardenberg]

You can display pi as a sybolic

disp(sym(pi))

π

Or you can use a π-character (𝜋 or π).

disp("𝜋")

𝜋

disp("π")

π

Answer 3

[Hiro Yoshino]

How about this?

S = sprintf('Zak Phase of 0th band = %c',960);
disp(S);

Zak Phase of 0th band = π

[Hiro Yoshino]

Please refer to the list of Unicode for your help:List of Unicode characters