Convert for loop to while loop, that is the script
z1=zeros(10);
for x=1: 10
for y=1: 10
z1(x, y)=x^2-3*y
end
end
z1

To convert for loop to while loop we have to first declare and initialize the integers or variables that will work as an counter.

script will be

z1=zeros(10);

x=1

while x<10

y=1

while y<10

z1(x,y)=x^2-3*y

y=y+1

end

x=x+1

end

z1

Remember that we have to update the counter every time that we not need to be done for loop.

its true for the one time