Create factorial.cpp

factorial/factorial.c

@@ -0,0 +1,14 @@
+#include<stdio.h>
+//to find factorial
+void main()
+{
+	long int num,a=1,i;
+	printf("Enter the no to find the factorial");
+	scanf("%d",&num);
+	for(i=1;i<num;num--)
+	{
+		a=a*num;
+		//decrementing value of num(num--;)
+	}
+	printf("\n factorial is %d",a);
+}

factorial/factorial_sum.c

@@ -0,0 +1,16 @@
+//sum of seven terms of factorial
+#include<stdio.h>
+void main()
+{
+	double fact=1,res=0;
+	int i,n;
+	printf("To calculate the sum of series 1/1!+2/2! ..till n/n! \n ");
+	printf("Enter value of n\n");
+	scanf("%d",&n);
+	for(i=1;i<8;i++)
+	{
+		fact=fact*i;
+		res+=i/fact;
+	}
+	printf("the sum of series 1/1!+2/2! ..till n/n! is %lf",res);
+}