Conditional Statement (If-Else) in C

Definition:

The if-else statement is a decision-making statement in the C programming language. It allows a program to execute one block of code when the condition is true and another block when the condition is false.

Syntax:

if(condition)
{
    // statements
}
else
{
    // statements
}

Explanation:

The condition inside the if statement is evaluated first. If the condition is true, the statements inside the if block are executed. Otherwise, the statements inside the else block are executed.

Program: Check Positive or Negative Number

Explanation: This program accepts a number from the user. If the number is greater than zero, it displays Positive Number; otherwise, it displays Negative Number.

#include <stdio.h>
#include <conio.h>

main()
{

    int Number;

    clrscr();

    printf("Enter the Number : ");

    scanf("%d",&Number);

    if(Number > 0)
    {

        printf("\nPositive Number");

    }

    else
    {

        printf("\nNegative Number");

    }

    getch();

}

Output:

Practice Exercises

#include <stdio.h>
#include <conio.h>

main()
{
    int Number;

    clrscr();

    printf("Enter the Number : ");
    scanf("%d",&Number);

    if(Number > 10)
    {
        printf("\nNumber is Greater than 10");
    }
    else
    {
        printf("\nNumber is Less than or Equal to 10");
    }

    getch();
}