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Go Programming Language Increment and Decrement Operations
Go Programming Language Increment and Decrement Operations
Go language has special increment and decrement syntax.
Increment Operation
variable_name++ to increment by 1. Example a++ means a = a+1
// both code is same a = a + 1 a++
Go Increment Example
package main
import "fmt"
func main() {
// declare variable
var a int
// assign value
a = 5
fmt.Printf("a: %d\n", a)
//increment
a = a + 1
fmt.Printf("a+1: %d\n", a)
a++
fmt.Printf("a++:%d\n", a)
}
Output:
$ go build increment.go $ ./increment a: 5 a+1: 6 a++:7
++a is not supported in Go programming.
package main
import "fmt"
func main() {
// declare variable
var a int
// assign value
a = 5
fmt.Printf("a: %d\n", a)
//increment
a = a + 1
fmt.Printf("a+1: %d\n", a)
++a
fmt.Printf("++a:%d\n", a)
}
Build error:
$ go build increment.go # command-line-arguments ./increment.go:18: syntax error: unexpected ++, expecting }
Decrement Operation
variable_name-- to decrement by 1. Example a-- means a = a - 1
// both code is same a = a - 1 a--
Go Decrement Example
package main
import "fmt"
func main() {
// declare variable
var a int
// assign value
a = 5
fmt.Printf("a: %d\n", a)
// decrement
a = a -1
fmt.Printf("a - 1: %d\n", a)
a--
fmt.Printf("a--: %d\n", a)
}
Output:
$ go build decrement.go $ ./decrement a: 5 a - 1: 4 a--: 3
--a is not supported in Go programming.
package main
import "fmt"
func main() {
// declare variable
var a int
// assign value
a = 5
fmt.Printf("a: %d\n", a)
// decrement
a = a -1
fmt.Printf("a - 1: %d\n", a)
--a
fmt.Printf("--a: %d\n", a)
}
Build error:
$ go build decrement.go # command-line-arguments ./decrement.go:18: syntax error: unexpected --, expecting }« Previous Next »
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