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30 lines
489 B
C
30 lines
489 B
C
/* Sum of natural numbers - Write a recursive function to calculate 1+2+3+...+n */
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#include <stdio.h>
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#include <conio.h>
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long sum(int n)
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{
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if(n==1)
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return 1 ;
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else
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return ( n + sum(n-1) ) ;
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}
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void main()
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{
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int n ;
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clrscr() ;
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printf("Enter n: ") ;
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scanf("%d", &n) ;
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printf("Sum of first %d natural numbers is %ld", n, sum(n) ) ;
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getch() ;
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}
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/*
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Output:
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Enter n: 3
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Sum of first 3 natural numbers is 6
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*/
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