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How to Print an Integer in Swift Program?
This tutorial will discuss how to write a swift program to print an Integer. Integers represents the number with no fractional component like 45, 980, -234, 24, etc. Swift supports both signed as well as unsigned integers in 8, 16, 32, and 64 bit. Here signed integer is represented by Int whereas unsigned integer is represented by UInt and their size is same as the current platform e.g if the platform is 32-bit then the size is Int32 or UInt32 unless you work with some specific size of the integer.
Syntax
Following is the syntax for creating integer type variable
var x : Int Or var y : Uint
Algorithm to Print Integers
Step 1 − Define two variables
Step 2 − Enter the value of those variables in any of the integer types −
Int, UInt, Int8, and UInt16
Step 3 − Perform operations with those variables
Step 4 − Print the output
Example
Print an Integer
The following program shows how to print an integer. Here we create four variables of integer type with different sizes like Int, UInt, Int8, and UInt16.
import Foundation
import Glibc
var number1 : Int
var number2 : UInt
var number3 : Int8
var number4 : UInt16
number1 = -900
number2 = 1872
number3 = 2
number4 = 234
print("Number 1:", number1);
print("Number 2:", number2);
print("Number 3:", number3);
print("Number 4:", number4);Output
Number 1: -900 Number 2: 1872 Number 3: 2 Number 4: 234
As you can see that the integers are created in Int, UInt, Int8, and UInt16.
Example
Now we will check what will happen if we change the sign of the above values.
import Foundation
import Glibc
var number1 : Int
var number2 : UInt
var number3 : Int8
var number4 : UInt16
number1 = 900
number2 = -1872
number3 = -2
number4 = -234
print("Number 1:", number1);
print("Number 2:", number2);
print("Number 3:", number3);
print("Number 4:", number4);Output
main.swift:12:11: error: negative integer '-234' overflows when stored into unsigned type 'UInt16' number4 = -234 ^ main.swift:10:11: error: negative integer '-1872' overflows when stored into unsigned type 'UInt' number2 = -1872
Here, Int and Int8 can accept both negative and positive values whereas Uint and UInt16 can only accept positive value if we try to add negative values we will get the following errors.
Example
Print an Integer given by the user
The following program shows how to print an integer given by the user.
import Foundation
import Glibc
print("Hello User! \nPlease enter a number:")
if let num = readLine(){
if let value = Int(num)
{
print("Entered Integer: ", value);
}
}Input
Hello User! Please enter a number: 2345
Output
Entered Integer: 2345
Here we use readLine() function to read input from the user. Then we convert the input into integer using Int() function and display the entered value using print() function.
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