It could be called a straight edge.
It is often called a straight-edge.
Stright edge
Numbers written without exponents are called Standard Form.
A ruler with no numbers is often referred to as a "blank ruler" or a "non-standard ruler." It can be used for drawing straight lines or measuring lengths based on visual estimation or other reference points, rather than numerical measurements. This type of ruler is useful in artistic contexts or for educational purposes, allowing users to focus on spatial relationships without the distraction of numerical values.
a ruler is called "Fürst"
Whole numbers without decimals or fractions are called integers.
A ruler is called 'une règle' (fem.) in French.
Called a straight edge
Whole numbers which are called integers
2.5cm
by the numbers that are marked there
When there is only one ruler, it is typically referred to as a monarchy if the ruler is a king or queen, or as a dictatorship if the ruler has absolute power without constitutional limitations. In both cases, the authority is centralized in a single individual, who often has significant control over the state and its governance.