Answer:
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.