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How to Add two Numbers in Swift Program?
This tutorial will discuss how to write a swift program to add two numbers.
Adding two numbers in Swift language is simple and can be performed with the help of the addition arithmetic operator(+). The arithmetic addition operator (+) uses two numbers as operands and returns their sum as output.
In this operator, both the operands should be of the same data types, For example swift allows adding a float into float without an issue but if we will try to add different types of data types using (+) operator then the compiler will raise an error, For example adding an Int and Float will raise a compile time error.
Syntax
Following is the syntax of Swift arithmetic addition operator (+) −
operand1 + operand2
Algorithm to add two numbers
Step 1 − Define two variables
Step 2 − Enter the value of those variables
Step 3 − Perform addition of those two variables
Step 4 − Print the output
Example
The following Swift program will show how to calculate the sum of two numbers.
import Foundation
import Glibc
var num1 = 190
var num2 = 243
var num3 = 40.3
var num4 = 34.56
var sum1 = num1 + num2
var sum2 = num3 + num4
print("Expression: 190 + 243, Result:", sum1)
print("Expression: 40.3 + 34.56, Result:", sum2)Output
Expression: 190 + 243, Result: 433 Expression: 40.3 + 34.56, Result: 74.86
Example
Now we will check what will happen when we try to add two numbers of a different data types with the help of the below example. Here the num1 is of integer type and num2 is of float type.
import Foundation
import Glibc
var num1 = 20
var num2 = 40.45
var sum = num1 + num2
print("Expression: 190 + 243, Result:", sum)Output
main.swift:8:16: error: binary operator '+' cannot be applied to operands of type 'Int' and 'Double' var sum = num1 + num2 ~~~~ ^ ~~~~ main.swift:8:16: note: overloads for '+' exist with these partially matching parameter lists: (Date, TimeInterval), (DispatchTime, Double), (DispatchWallTime, Double), (Double, Double), (Int, Int) var sum = num1 + num2
In the above code, we are getting an error because we are trying to add two different data types that are Int and Double, and the (+)operator does not support the addition of different data types.
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