Addition operator in Golang

An addition operator adds two variable or value provided to it. It returns the result after performing operation. If multiple operator exists in the operation, it evaluate the operation from left to right.

Syntax

 1 <variable> + <variable>
 2 <value> + <value>
 3 // evaluate from left to right ie. two variable added first and result will be added with value
 4 <variable> + <variable> + <value>

Addition operator

 1 package main
 2 
 3 import "fmt"
 4 
 5 func main() {
 6 	var a, b int
 7 
 8 	a = 10
 9 	b = 20
 10 
 11 	c := a + b
 12 
 13 	fmt.Printf("Sum of a + b is : %d", c)
 14 }

In the above example, we have define two integer variables and initialize this variable with 10, 20 respectively. A addition of two variables is assign to variable C and printed the result.

Output

 1 Sum of a + b is : 30

Multiple addition operator in same expression

 1 package main
 2 
 3 import "fmt"
 4 
 5 func main() {
 6 	
 7 	a := 10
 8 	b := 20
 9 
 10 	c := a + b + 20
 11 
 12 	fmt.Printf("Sum of a + b + 20 is : %d", c)
 13 }

In the above example, a variable declared and initialized with respective values. An expression is specified that perform addition of two variable and value that includes multiple addition operator.

If an expression includes multiple addition operator, an expression evaluated from left to right, hence, it perform addition of a + b and the resulting value added with value 20 and assigned to the variable. A resulting value will be printed using printf() function.

Output