can u explain the insertion sort in C with the code ?

 #include<stdio.h>
int main(){
 
  int i,j,s,temp,a[20];
 
  printf("Enter total elements: ");
  scanf("%d",&s);
 
  printf("Enter %d elements: ",s);
  for(i=0;i<s;i++)>
      scanf("%d",&a[i]);
 
  for(i=1;i<s;i++){>
      temp=a[i];
      j=i-1;
      while((temp<a[j])&&(j>=0)){
      a[j+1]=a[j];
          j=j-1;
      }
      a[j+1]=temp;
  }
 
  printf("After sorting: ");
  for(i=0;i<s;i++)>
      printf(" %d",a[i]);
 
  return 0;
}
 
Output:
Enter total elements: 5
Enter 5 elements: 3 7 9 0 2
After sorting:  0 2 3 7 9</stdio.h>