#include <stdio.h>

int main() {
    int i; //변수 선언
    for(i=1;i<11;i++){ //초기식,조건식,증감식
        printf("%d\n", i);
    }

    i=1; //초기식
    while(i<11){ //조건식
        printf("%d\n", i);
        i++; //증감식
    }

    i=1; //초기식
    do{
        printf("%d\n", i);
        i++; //증감식
    }while(i<11);

    for(i=10;i>0;i--){
        printf("%d\n", i);
    }

    i=10;
    while(i>1){
        printf("%d\n", i);
        i-=2; //i=i-2
    }

    int sum=0;
    i=1;
    while(i<11){
        sum=sum+i;
        i++;
    }
    printf("%d\n", sum);
    
    
}

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