# C Exercises: Calculate the perimeter of the triangle

## C Basic Declarations and Expressions: Exercise-23 with Solution

Write a C program that reads three floating-point values and checks if it is possible to make a triangle with them. Determine the perimeter of the triangle if the given values are valid.

**Pictorial Presentation:**

**C Code:**

```
#include <stdio.h>
int main() {
float x, y, z, P, A; // Declare variables for side lengths and perimeter
// Prompt user for the side lengths and store in 'x', 'y', and 'z'
printf("\nInput the first number: ");
scanf("%f", &x);
printf("\nInput the second number: ");
scanf("%f", &y);
printf("\nInput the third number: ");
scanf("%f", &z);
if(x < (y+z) && y < (x+z) && z < (y+x)) // Check if the sides can form a triangle
{
P = x+y+z; // Calculate perimeter
printf("\nPerimeter = %.1f\n", P); // Print perimeter
}
else
{
printf("Not possible to create a triangle..!"); // Print message if it's not possible to form a triangle
}
return 0;
}
```

Sample Output:

Input the first number: 25 Input the second number: 15 Input the third number: 35 Perimeter = 75.0

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