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34 lines
741 B
C
34 lines
741 B
C
/* Sum of series - Program to calculate sum of series 1/2 - 3/4 + 5/6 - 7/8 ....... upto n terms - June 2014 */
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#include <stdio.h>
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#include <conio.h>
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void main()
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{
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int i, n ;
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float k, s=0 ;
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clrscr() ;
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printf("Enter n: ") ;
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scanf("%d", &n) ;
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/* i keeps track of term count , whereas k is used for calculation purpose */
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for(i=1, k=1 ; i<=n ; i++, k=k+2)
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{
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if(i%2==1)
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s=s + k/(k+1) ;
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else
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s=s - k/(k+1) ;
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}
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/* k has to be float in the above expression. If k is int then s will remain zero */
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printf("Sum of the required series is %f", s) ;
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getch() ;
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}
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/*
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Output :
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Enter n: 4
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Sum of the required series is -0.291667
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*/
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