C :

#include<stdio.h>
int main(){
	int x,y;
	scanf("%d",&x);
	if(x>0){
		y=x+1;
	}else if(x==0){
		y=0;
	}else{
		y=x-1;
	}
	printf("%d",y);	
	return 0;
}

C++ :

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	int x,y;
	cin>>x;
	if(x<0){
		y=x-1;
	}else if(x==0){
		y=0;
	}else{
		y=x+1;
	}
	cout<<y<<endl;
	
}
	

Pascal :

var n,y:longint;
begin
  read(n);
  y:=0;
  if n>0 then y:=n+1;
  if n=0 then y:=n;
  if n<0 then y:=n-1;
  writeln(y);
end.

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scanner=new Scanner(System.in);
		int x=scanner.nextInt();
		int y;
		
		if (x>0) {y=x+1;
			System.out.println(y);	}	
		if (x==0) {y=0;
		System.out.println(y);	}	
		if (x<0) {y=x-1;
		System.out.println(y);	}	
		}
}

Python :

x=int(input())
if x>0:
    y=x+1
elif x==0:
    y=0
elif x<0:
    y=x-1
print(y)