Hi there today i try to coding euler in C programming. Let’s talk about the euler number first, what is the euler number? İs a commonly used number in engineering. Capacitor voltage formula, example of this.

Let try calculate euler number.

**#include<stdio.h>
int fact(int a){
int b,c;
if(a==1){
return 1;
}
else{
b=fact(a-1)*a;
return b;
}}
double euler(int a){
double b=0,c=0;
if(a==1){
return 2;
}
else{
c=fact(a);
b=1/c;
c=b+euler(a-1);
return c;
}}
int main(){
int a;
double e;
printf("how many step calculate for euler?\n");
scanf("%d",&a);
if(a!=1){
e=euler(a-1);
}
else{
e=1;
}
printf("\nResult the steps:%.20f",e);
}**