#include <stdio.h>
int main() {
int i;
for(i=1;i<11;i+=1){
printf("%d\n",i);
}
i=1;
while(i<=20){
printf("현재 값은 %d입니다.", i);
i+=2; //증가
}
i=20;
while(i>1){
printf("%d\n", i);
i-=2;
}
}
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