Infix, Prefix, and Postfix

• Three ways to write expressions

• Infix

  • Most normal way. Operand Operator Operand
  • e.g. 2 + 3
  • If precedence isn't what you want, you need to add parentheses. e.g. ( 1 + 2 ) * 3

• Prefix

  • Operator Operand Operand
  • e.g. + 2 3