c循环语句for,while,do while,goto

for语句：

#include <stdio.h>

int main(void)
{
  int i,sum=0;
  for(i=0;i<=100;i++)
  {
    sum = sum+i;
  }
  printf("the sum is %d\n",sum);
  return 0;
}

while语句：

#include<stdio.h>

main()
{
  int i=0,sum=0;
  while(i<=100)
  {
    sum = sum+i;
    i++;
  }
  printf("the sum is %d\n",sum);
  return 0;
}

do-while语句：

#include<stdio.h>

main()
{
  int i,sum=0;
  do {
    sum = sum+i;
    i++;
  }
  while(i<=100);
  printf("the sum is %d\n",sum);
  return 0;
}

goto语句：

#include<stdio.h>

main()
{
  int i=0,sum=0;
  loop: if(i<=100)
  {
    sum = sum + i;
    i++;
    goto loop;
  }
  printf("the sum is %d\n",sum);
  return 0;
}

以上都是linux下经gcc编译通过的程序，确认无误！