➤ If-else Statement in C
➤ Programs on if-else
➤ Switch Case in C
➤ Switch case Programs
➤ Conditional Operator
➤ While loop in C
➤ Do-while loop in C
➤ While vs do-while
➤ For loop in C
➤ Break keyword in C
➤ Continue keyword in C
➤ Break vs Exit in C
➤ Goto keyword in C
☕️ Flow Control Programs
➤ Largest in 3 Numbers
➤ Find Grade of student
➤ Find the absolute value
➤ Vowel or Consonant
➤ Leap Year Program
➤ Simple calculator in C
➤ Check Odd or Even
➤ Roots of Quadratic Equation
➤ Find Reverse of Number
➤ Factors of a number in C
➤ Generate Multiplication table
➤ Find Power of a Number
➤ Find GCD and LCM
➤ Find factorial of Number
➤ Count Number of Digits
➤ Sum of digits in Number
➤ Sum of N Natural Numbers
➤ Sum of Squares of Natural No.
➤ Find Sum of Odd Numbers
➤ Find the Sum of Series
➤ Find Fibonacci series in C
➤ Sum of the Fibonacci series
➤ Sum until enters +ve numbers
➤ Sum of max 10 no. & Skip -ve
☕️ C Conversion Programs
➤ Celsius to Fahrenheit
➤ Fahrenheit to Celsius
➤ Decimal ↔ Binary
➤ Decimal ↔ Octal
➤ Octal ↔ Binary in C
☕️ Number Programs in C
➤ Prime Number in C
➤ Strong Number in C
➤ Krishnamurthy Number
➤ Neon Number in C
➤ Palindrome number
➤ Perfect Number in C
➤ Armstrong Number
☕️ Pattern Programs in C
➤ Pattern programs in C
➤ Printing pattern using loops
➤ Floyd’s triangle Program
➤ Pascal Triangle Program
➤ Pyramid Star Pattern in C
➤ Diamond Pattern Programs
➤ Half Diamond pattern in C
➤ Print Diamond Pattern
➤ Hollow Diamond Pattern
➤ Diamond Pattern of Numbers
Write a program to find the sum of the Fibonacci series in C language. Previously, we have written a C program for Fibonacci Series. In the Fibonacci series, the next element will be the sum of the previous two elements. The Fibonacci sequence is a series of numbers where a number is found by adding up the two numbers before it. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so forth. Written as a rule, the expression is Xn= Xn-1+ Xn-2
By definition, the first two numbers in the Fibonacci sequence are either 1 and 1, or 0 and 1, depending on the chosen starting point of the sequence, and each subsequent number is the sum of the previous two.
Sum of Fibonacci series in a range
#include<stdio.h>
int main()
{
int a=0, b=1, range, c, sum=0;
printf("Enter the range of Fibonacci series: ");
scanf("%d",&range);
printf("The fibonacci series is: \t");
while( a <= range )
{
printf("%d\t",a);
sum += a;
c = a + b;
a = b;
b = c;
}
printf("\nTheir sum is = %d", sum);
return 0;
}Output for different test-cases:-
Enter the range of Fibonacci series: 20
The fibonacci series is: 0 1 1 2 3 5 8 13
Their sum is = 33
Enter the range of Fibonacci series: 50
The Fibonacci series is: 0 1 1 2 3 5 8 13 21 34
Their sum is = 88
Sum of first N terms of Fibonacci series in C
#include<stdio.h>
int main()
{
int a=0, b=1, num, c, sum=0;
printf("Enter number of terms: ");
scanf("%d",&num);
for(int i=0; i<num; i++)
{
sum += a;
c = a + b; //next element
a = b;
b = c;
}
printf("Sum = %d", sum);
return 0;
}Output for different test-cases:-
Enter number of terms: 9
Sum = 54
See Also:-
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