% start: preferences->keyboard->shortcuts->Active settings: windows default
 1 + 1
ans =
     2
1/3 + 1/7
ans =
    0.4762
% help format
format long
1/3 + 1/7
ans =
   0.476190476190476
pi
ans =
    3.1416
sqrt(42)
ans =
    6.4807
A = [ 1 2 3]
A =
     1     2     3
B = [ 1; 2 ; 3]
B =
     1
     2
     3
A * B
ans =
    14
B * A
ans =
     1     2     3
     2     4     6
     3     6     9
C = [ 1 2 ; 3 4]
C =
     1     2
     3     4
inv(C)
ans =
   -2.0000    1.0000
    1.5000   -0.5000
inv(C) * C
ans =
    1.0000         0
    0.0000    1.0000
% help colon % help :
t = 0 : 0.2 :10 ;
y = sin(t) ;
% help plot
plot( t, y, 'r', t, y, 'b*' )
% help linspace
% diary off
