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GNU Octave

8.4 Comparison Operators

Comparison operators compare numeric values for relationships such as equality. They are written using relational operators.

All of Octave's comparison operators return a value of 1 if the comparison is true, or 0 if it is false. For matrix values, they all work on an element-by-element basis. For example,

[1, 2; 3, 4] == [1, 3; 2, 4] => 1 0 0 1

If one operand is a scalar and the other is a matrix, the scalar is compared to each element of the matrix in turn, and the result is the same size as the matrix.

x < y

True if x is less than y.

x <= y

True if x is less than or equal to y.

x == y

True if x is equal to y.

x >= y

True if x is greater than or equal to y.

x > y

True if x is greater than y.

x != y

x ~= y

x <> y

True if x is not equal to y.

String comparisons may also be performed with the strcmp function, not with the comparison operators listed above. See section 5. Strings.