1. Write a program in c language to validate or check weather a given number is positive or negative using the if statement.

Objective:
The objective of this program is to determine whether a given number is positive or negative. By utilizing an if statement in C language, we can create a logical condition that checks the sign of the number and provides an output based on the result.
Agenda:
The agenda of this program is to guide the user through the process of understanding how conditional statements work in programming, specifically focusing on the if statement in C language. By breaking down the steps involved in checking the sign of a number, users can gain a deeper understanding of how to implement similar logic in their own programs.
Purpose:
The purpose of creating a program to validate whether a given number is positive or negative is to demonstrate the practical application of conditional statements in programming. By focusing on a simple yet fundamental concept like checking the sign of a number, users can understand the foundational principles of programming logic and decision-making processes. This program helps as a starting point for beginners to understand how to implement basic conditional statements in their code.
Real-Life Applications:
Understanding how to check whether a number is positive or negative using conditional statements has various real-life applications across different industries and fields. For example, in finance, determining the sign of a financial value can help in analysing profit or loss. In scientific research, identifying the positivity or negativity of data points can aid in drawing conclusions from experimental results. Additionally, in engineering, verifying the sign of a variable can be crucial for making decisions in designing systems or structures.
Validate or check weather a given number is positive or negative using the if statement.

/* a program in C to Validate or check weather a given
number is positive or negative using the if statement. */
#include <stdio.h>
int main()
{
int n; // Ask the user to any enter a number
printf("Enter any number:\n ");
scanf("%d", &n);
// Check whether the number is positive or negative
if (n>0) {
printf("\n Number %d is a positive.", n);
}
else if (n< 0)
{
printf("\n Number %d is a negative.", n);
}
else {
printf("\n The number is zero.\n");
}
return 0;
}

a program in c language to validate or check weather a given number is positive or negative using the if statement.

Output:
Enter any number:
5
Number 5 is a positive

Explanation
Include the #include<stdio.h> Standard Input-Output Library header file to ensures that the functions for input and output processes are accessible.
int main() function definition starts the execution of the program.
then subsequently we declare a variable n to store a number provided by the user.
We ask the user to enter a any number using printf() function and read the entered input number using standard input scanf() function.
Then We use the if statement to checked whether number n is greater than 0 or not. If the given number n is greater than zero so, we shown that the number n is a positive number.
If the number given n is less than 0 we show that the number is negative using printf().
If the number n is zero 0 neither negative nor positive we show that the number n is equal to zero 0.
Finally, the program returns 0 to specify successful execution of the program.

Other Topic:-->>Nested While Loop.
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