To express all real numbers except 0, we can use the notation for real numbers, denoted by the symbol ℝ, and exclude 0 from this set.
Mathematically, this can be represented as:
ℝ \ {0}
Here, \ is the set difference symbol, indicating that we are taking the set of all real numbers and removing the element 0 from it.
This representation includes all positive and negative numbers, fractions, irrational numbers, and so on, but explicitly excludes zero.