### What is associativity of operators and why is it important?

What is associativity (for an operator) and why is it important?Updated: operator associativity...Read more

### associativity - Understanding associative operations

If something is associative, then for example $(x + y) + z = x + (y + z)$ is true. I also know that in general subtraction is not an associative operation, but what if subtraction is applied to $\lbrace 0 \rbrace$. Is subtraction an associative operation then? Since $0-0=0-0$....Read more