Type of operation Symbol Example Assignment ← or := c ← 2πr, c := 2πr Comparison =, ≠, <, >, ≤, ≥ Arithmetic +, −, ×, /, mod Floor/ceiling ⌊, ⌋, ⌈, ⌉ a ← ⌊b⌋ + ⌈c⌉ Logical and, or Sums, products Σ Π h ← Σa∈A 1/a