## C Program to Find the Sum of A.P Series

*C Program to Find the Sum of A.P Series*

* #include <stdio.h>*

* #include <math.h> int main()*

* {*

* int a, d, n, i, tn;*

* int sum = 0; printf("Enter the first term value of the A.P. series: ");*

* scanf("%d", &a);*

* printf("Enter the total numbers in the A.P. series: ");*

* scanf("%d", &n);*

* printf("Enter the common difference of A.P. series: ");*

* scanf("%d", &d);*

* sum = (n * (2 * a + (n - 1)* d ))/ 2;*

* tn = a + (n - 1) * d;*

* printf("Sum of the A.P series is: ");*

* for (i = a; i <= tn; i = i + d )*

* {*

* if (i != tn)*

* printf("%d + ", i);*

* else*

* printf("%d = %d ", i, sum);*

* }*

* return 0;*

* }*

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