octave: Increment Ops
8.7 Increment Operators
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_Increment operators_ increase or decrease the value of a variable by 1.
The operator to increment a variable is written as ‘++’. It may be used
to increment a variable either before or after taking its value.
For example, to pre-increment the variable X, you would write ‘++X’.
This would add one to X and then return the new value of X as the result
of the expression. It is exactly the same as the expression ‘X = X +
1’.
To post-increment a variable X, you would write ‘X++’. This adds one
to the variable X, but returns the value that X had prior to
incrementing it. For example, if X is equal to 2, the result of the
expression ‘X++’ is 2, and the new value of X is 3.
For matrix and vector arguments, the increment and decrement
operators work on each element of the operand.
Here is a list of all the increment and decrement expressions.
‘++X’
This expression increments the variable X. The value of the
expression is the _new_ value of X. It is equivalent to the
expression ‘X = X + 1’.
‘--X’
This expression decrements the variable X. The value of the
expression is the _new_ value of X. It is equivalent to the
expression ‘X = X - 1’.
‘X++’
This expression causes the variable X to be incremented. The value
of the expression is the _old_ value of X.
‘X--’
This expression causes the variable X to be decremented. The value
of the expression is the _old_ value of X.
Info Catalog
octave: Assignment Ops
octave: Expressions
octave: Operator Precedence