Swift Comparison Operators

by Online Tutorials Library July 22, 2022

Comparison Operators

Swift 4 supports all standard comparison operators of C language.

Equal to (a == b)
Not equal to (a != b)
Greater than (a > b)
Less than (a < b)
Greater than or equal to (a >= b)
Less than or equal to (a <= b)

Note: Swift 4 also provides two identity operators (=== and !==), which is used to test whether both object references refer to the same object instance.

Every comparison operator returns a Bool value to specify whether the statement is true or not.

  1 == 1   // true because 1 is equal to 1  2 != 1   // true because 2 is not equal to 1  2 > 1  // true because 2 is greater than 1  1 < 2  // true because 1 is less than 2  1 >= 1  // true because 1 is greater than or equal to 1  2 <= 1  // false because 2 is not less than or equal to 1  

Comparison operators are used in conditional statement as if statement.

Example 1

  let name = “world”  if name == “world” {      print(“hello, world”)  } else {      print(“I am sorry. I don’t recognize you”)  }  // Prints “hello, world”, because name is indeed equal to “world”.  

Output:

hello, world

Example 2

  let name = “world”  if name == “TutorAspire” {      print(“hello, world”)  } else {      print(“I am sorry. I don’t recognize you”)  }  // Prints “I am sorry. I don’t recognize you”, because name is not equal to “world”.  

Output:

I am sorry. I don't recognize you

Next TopicTernary Conditional

Swift Comparison Operators

Comparison Operators

Note: Swift 4 also provides two identity operators (=== and !==), which is used to test whether both object references refer to the same object instance.

Example 1

Example 2

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