Terminate for, while, switch, try, and if statements or indicate last index

Syntax

while expression               % (or if, for, or try)

    statements  
end

B = A(index:end,index)

Description

end is used to terminate for, while, switch, try, and if statements. Without an end statement, for, while, switch, try, and if wait for further input. Each end is paired with the closest previous unpaired for, while, switch, try, or if and serves to delimit its scope.

The end command also serves as the last index in an indexing expression. In that context, end = (size(x,k)) when used as part of the kth index. Examples of this use are X(3:end) and X(1,1:2:end-1). When using end to grow an array, as in X(end+1)=5, make sure X exists first.

You can overload the end statement for a user object by defining an end method for the object. The end method should have the calling sequence end(obj,k,n), where obj is the user object, k is the index in the expression where the end syntax is used, and n is the total number of indices in the expression. For example, consider the expression

A(end-1,:)

MATLAB will call the end method defined for A using the syntax

end(A,1,2)

Examples

for i = 1:n
    if a(i) == 0
        a(i) = a(i) + 2;
    end
end

A = magic(5)

A =

    17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9

B = A(end,2:end)

B =

    18    25     2     9

See Also