Two stacked wavy strokes, meaning 'roughly equal to'.
Also known as: Approximation sign, Roughly equals, Almost equal to, Double tilde
The approximation sign states that two quantities are close but not exactly equal — a rounded value, or a result of measurement.
States that two quantities are approximately equal, as in π ≈ 3.14.
Contexts: Mathematics
Is used for rounded values and measured results, where exact equality would be a stronger claim than the evidence supports.
Contexts: Mathematics
Two wavy horizontal strokes, one above the other.
Both are two stacked horizontal strokes; the approximation sign's are wavy. Recorded as visual similarity rather than confusion, because reciprocal confusion would need evidence from the equals sign's side too.