How to print the line number of a Swift source code

Overview

In a source code, each line is referred to as a line number. We can write our code and also print the line number of each line of code.

Syntax

print(#line)
Syntax to print line numbers of a source code

Parameters

#line: This represents each line number in the source code.

Return value

It returns the line number of each source code.

Example

import Swift
// create some variables
var num1 = 34;
var num2 = 50;
print("This is line: ", #line)
print("The sum of ", num1, " and ", num2, "is and line number is ", #line)

Explanation

  • Lines 4 and 5: We create some variables and initialize them.
  • Line 7: We print the line number.
  • Line 8: We print the sum of the variables we created and print the line numbers.

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