** Repeat statements a specific number of times. **

** The general form of a FOR statement is: **

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** FOR variable = expr, statement, ..., statement END **

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** The columns of the expression are stored one at a time in **

** the variable and then the following statements, up to the **

** END , are executed. The expression is often of the form X:Y, **

** in which case its columns are simply scalars. Some examples **

** (assume N has already been assigned a value). **

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** FOR I = 1:N, **

** FOR J = 1:N, **

** A( I ,J ) = 1/(I +J-1); **

** END **

** END **

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** FOR S = 1.0: -0.1: 0.0, END steps S with increments of -0.1 **

** FOR E = EYE (N), ... END sets E to the unit N-vectors. **

** **