How will change the scale value in the figure?

I have marked blue colors in the figure below. There I want to change the scale value on the y-axis.

How do I do 6.0x10^6 instead of 4.5x10^5 here?

I have written the code below for better understanding.

clc;
close all;
clear;
figure
components = {'DG', 'PV', 'Converter', 'Battery'};
y = [445000, 160777, 108888, 265153];
hB = bar(y,'FaceColor','flat');
xticklabels(components);
C = colororder;                                                            % retrieve default colororder vector
hB.CData = C(1:numel(y),:);                                                % use first N
grid on
xlabel ('Components Name','fontweight','bold','FontSize',12);
ylabel ('Net Present Cost ($)','fontweight','bold','FontSize',12);

hAx = gca;                                                                 % get current axes handle
hAx.YAxis.TickLabelFormat = '%0.1f';                                       % fix up the funky numeric display
% now add a legend by faking another plot that will create the handles
hold on
hA = area(nan(numel(components)));                                         % area will be patch 
set(hA,{'FaceColor'},mat2cell(hB.CData,[ones(size(y))],3));                % set areas to match bar face colors
hLg = legend(hA,components); 

Answer 1

[KSSV]

Read about ylim

 ylim([0 6*10^6])

[AZ Sajjad]

A lot of thanks, sir, for giving your precious time.