# C Exercises: Display the first n terms of Fibonacci series

## C For Loop: Exercise-35 with Solution

Write a program in C to display the first n terms of the Fibonacci series.

The series is as follows:

Fibonacci series 0 1 2 3 5 8 13 .....

**Visual Presentation:**

**Sample Solution:**

**C Code:**

```
#include <stdio.h> // Include the standard input/output header file.
int main() {
int prv = 0, pre = 1, trm, i, n; // Declare variables for previous, current, and next terms, as well as loop counters.
// Prompt the user to input the number of terms.
printf("Input number of terms to display: ");
scanf("%d", &n); // Read the input from the user.
// Print a message indicating the number of terms.
printf("Here is the Fibonacci series up to %d terms:\n", n);
printf("%5d %5d", prv, pre); // Print the first two terms.
for (i = 3; i <= n; i++) { // Loop to generate the Fibonacci series starting from the third term.
trm = prv + pre; // Calculate the next term.
printf("%5d", trm); // Print the next term.
prv = pre; // Update the previous term.
pre = trm; // Update the current term.
}
printf("\n"); // Move to the next line after printing the series.
return 0; // Return 0 to indicate successful execution.
}
```

Sample Output:

Input number of terms to display : 10 Here is the Fibonacci series upto to 10 terms : 0 1 1 2 3 5 8 13 21 34

**Flowchart: **

**C Programming Code Editor:**

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**Next:** Write a program in C to display the such a pattern for n number of rows using a number which will start with the number 1 and the first and a last number of each row will be 1.

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