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Swift program to check a string is empty or not

Here, we are going to learn how to check a string is empty or not in Swift programming language?
Submitted by Nidhi, on June 10, 2021

Problem Solution:

Here, we will create string variables and check strings are empty or not using the isEmpty() function, and print the appropriate message on the console screen.

Program/Source Code:

The source code to check a string is empty or not is given below. The given program is compiled and executed successfully.

// Swift program to check a string 
// is empty or not

var str1 = ""
var str2 = String()
var str3 = "Hello World"

if(str1.isEmpty)
{
    print("str1 is an empty string")
}
else
{
    print("str1 is not empty string")
}
if(str2.isEmpty)
{
    print("str2 is an empty string")
}
else
{
    print("str2 is not empty string")
}
if(str3.isEmpty)
{
    print("str3 is an empty string")
}
else
{
    print("str3 is not empty string")
}

Output:

str1 is an empty string
str2 is an empty string
str3 is not empty string

...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift;

Here, we created three string variables str1, str2, str3. Then we check each string is empty or not using the isEmpty() function and print appropriate messages on the console screen.

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