A number is said to be positive if it is greater than zero and it is said to be negative if it is less than zero. A number can be checked for zero, positive and negative using if, if-else, nested if-else and short-hand if-else statements.
In the below example, only if conditional statements are used.
using System;
namespace MyApplication {
class MyProgram {
static void CheckNumber(double x) {
String message = "";
if (x > 0)
{message = "Positive number";}
if (x == 0)
{message = "Zero";}
if (x < 0)
{message = "Negative number";}
Console.WriteLine(message);
}
static void Main(string[] args) {
CheckNumber(5.5);
CheckNumber(-10.8);
}
}
}
Positive number Negative number
It can also be checked using If-else conditional statements.
using System;
namespace MyApplication {
class MyProgram {
static void CheckNumber(double x) {
String message = "";
if (x > 0)
{message = "Positive number";}
else if (x == 0)
{message = "Zero";}
else
{message = "Negative number";}
Console.WriteLine(message);
}
static void Main(string[] args) {
CheckNumber(5.5);
CheckNumber(-10.8);
}
}
}
Positive number Negative number
The above problem can also be solved using nested if-else conditional statements.
using System;
namespace MyApplication {
class MyProgram {
static void CheckNumber(double x) {
String message = "";
if (x >= 0)
{
if (x > 0)
{message = "Positive number";}
else
{message = "Zero";}
}
else
{message = "Negative number";}
Console.WriteLine(message);
}
static void Main(string[] args) {
CheckNumber(5.5);
CheckNumber(-10.8);
}
}
}
Positive number Negative number
Ternary operator can also be used here.
using System;
namespace MyApplication {
class MyProgram {
static void CheckNumber(double x) {
String message = "";
message = (x > 0)? "Positive number" : (x == 0)? "Zero" : "Negative number";
Console.WriteLine(message);
}
static void Main(string[] args) {
CheckNumber(5.5);
CheckNumber(-10.8);
}
}
}
Positive number Negative number
