Basic operators

Swift provides the following basic operations:

• The = operator for assignments, similar to many different programming languages.
• The + operator for addition, - for subtraction, * for multiplication, / for pision, and % for remainders. These operators are functions that can be passed to other functions.
• The -i operator for unary minus and +i for unary plus operations.
• The +=, -=, and *= operators for compound assignments.
• The a == b operator for equality, a != b for inequality, and a>b, a<b, and a<=b for greatness comparison.
• The ternary conditional operator, question ? answer1: answer2.
• nil coalescing a ?? b unwraps optional a if it has a value and returns a default value b if a is nil.
• Range operators:
  • Closed range (a...b) includes the values a and b
  • Half-open range (a..<b) includes a but does not include b
• Logical operators:
• • The !a operator is NOT a
  • The a && b operator is logical AND
  • The a || b operator is logical OR