k=0.1;
t=0;
for n=1:10
t=t+k;
end
t

t =

    1.0000

format long e
t

t =

     9.999999999999999e-01

t=0

t =

     0

while (t < 1)
t=t+k;
while (t < 1)
t=t+k;
end
t

t =

     1.100000000000000e+00

while (t < 1)
t=0

t =

     0

while (t < 1)
t=t+k;
k=min(k,1-t);
end
t

t =

     1

t=0

t =

     0

while (t < 1)
t=t+k;
k=0.1

k =

     1.000000000000000e-01

t=0

t =

     0

while (t < 1)
t=t+k;
k=min(k,1-t)
end

k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.110223024625157e-16


k =

     0

k=0.1

k =

     1.000000000000000e-01

t=0

t =

     0

while (abs(t-1) > 1e-15)
t=t+k;
k=min(k,1-t)
end

k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.000000000000000e-01


k =

     1.110223024625157e-16

t

t =

     9.999999999999999e-01

k=0.1

k =

     1.000000000000000e-01

t=0

t =

     0

while (abs(t-1) > 1e-15)
t=t+k
k=min(k,1-t)
pause
end

t =

     1.000000000000000e-01


k =

     1.000000000000000e-01


t =

     2.000000000000000e-01


k =

     1.000000000000000e-01


t =

     3.000000000000000e-01


k =

     1.000000000000000e-01


t =

     4.000000000000000e-01


k =

     1.000000000000000e-01


t =

     5.000000000000000e-01


k =

     1.000000000000000e-01


t =

     6.000000000000000e-01


k =

     1.000000000000000e-01


t =

     7.000000000000000e-01


k =

     1.000000000000000e-01


t =

     7.999999999999999e-01


k =

     1.000000000000000e-01


t =

     8.999999999999999e-01


k =

     1.000000000000000e-01


t =

     9.999999999999999e-01


k =

     1.110223024625157e-16

help system
 SYSTEM   Execute system command and return result.
    [status,result] = SYSTEM('command') calls upon the operating system
    to execute the given command.  The resulting status and standard
    output are returned.
 
    Examples:
 
        [status,result] = system('dir')
        [status,result] = system('ls')
 
    returns status = 0 and, in result, a MATLAB string containing 
    a list of files in the current directory (assuming your operating 
    system knows about the "dir" or "ls" command).  If "dir" or "ls"
    fails or does not exist on your system, SYSTEM returns a nonzero 
    value in status, and an explanatory message in result.
 
    See also <a href="matlab:help dos">dos</a>, <a href="matlab:help unix">unix</a>, and ! (exclamation point) under <a href="matlab:help punct">punct</a>.

    Reference page in Help browser
       <a href="matlab:doc system">doc system</a>

system('ls')
2011-10-19.txt	ese4.m
2011-11-02.txt	ese4rk23.m
2011-11-09.txt	ese4rk23.m~
2011-11-23.txt	ese4rk2.m
2011-11-30.txt	fourier.m
2011-12-07.txt	ms2.m
2012-01-11.txt	phi1m.m
2012-01-25.txt	rk23.m
catenaria.m	rk23.m~
catenaria.m~	rk2.m
diff12ns.m	stiff.m
ese4eulero.m	thetametodolineare.m
ese4eulero.m~	thetametodolineare.m~
ese4exp.m

ans =

     0

diary off