Using loop functions

[jlb_2_99]

When using loop functions or statements which loop statement do you prefer to use that would be easy for a beginner like me to use:
The do while loop, for loop, or while loop. I ask because I am to re-write my code from using the If statement to using one of the stated loop functions into my code. I am writing a coke machine program, I haven't started re-writing it yet I wanted to know which one of the stated loop functions would be practical for a beginner like me to use. If you need to see my code here it is. It is written in If statements, I haven't started on the loop functions yet.

#include <stdio.h>
 
int main()
{
  char drinkchoice;    
  float insert;    
  float money = 1.00;   
  float totalinsert;    
  
  
 printf("\nHow much do you wish to insert: ");   
 scanf("%f", &insert);                       
 
 
 
 
 if(totalinsert < money)                       
 {
  printf("Please insert more money: ");
  scanf("%f", &insert);
  totalinsert = insert + totalinsert;
 }
 
 if(totalinsert < money)
 {
  printf("Please insert more money: ");
  scanf("%f", &insert);
  totalinsert = (insert + totalinsert);
 }
 
 if(totalinsert < money)
 {
  printf("Please insert more money: ");
  scanf("%f", &insert);
  totalinsert = (insert + totalinsert);
 }
 
 if(totalinsert < money)
 {
  printf("Please insert more money: ");
  scanf("%f", &insert);
  totalinsert = (insert + totalinsert);
 }
 
 if(totalinsert == money)        
  {
   printf("\nWhat would you like.");  
   printf("\nPress 1 for coke\nPress 2 for sprite\nPress 3 for  drpepper: ");
   scanf("%c", &drinkchoice);
   totalinsert = (totalinsert == insert);
          getchar();
          }
 
  
  
  if(drinkchoice == '1')      
  {
  printf("here is you coke");
  scanf("%c", &drinkchoice);
  getchar();
  }
  if(drinkchoice == '2')
  {
  printf("here is your sprite");
  scanf("%c", &drinkchoice);
  getchar();
  }
  if(drinkchoice == '3')
  {
  printf("here is your dr pepper");
  scanf("%c", &drinkchoice);
  getchar();
  }
  
  
  
 
 
 getchar();
 return 0;
 
 
}

[jim mcnamara]

Short answer would be to have a while loop controlled by the totalinsert and money variables

while( totalinsert < money)
{
   /* ask for money here, add it to total insert */
}
/* you get here when you have enough totalinsert */