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Calculating factorials using recursion

#include <stdio.h> long factorial(long); void main() { long number = 0; printf("\nEnter an integer value: "); scanf(" %ld", &number); printf("\nThe factorial of %ld is %ld\n", number, factorial(number)); } /* recursive factorial function */ long factorial(long i) { if( i < 2 ) return i; else return i*factorial(i - 1); }