#include <stdio.h>
void main(){
    int i, total=0;
    for(i=0; i<10; i++){
        if(!(i%2)) continue;
        //i=0일때 i%2=0, 1(참)이니까 continue
        //i=1일때 i%2=1, 0(거짓)이니까 total+=1
        //i=2일때 i%2=0, 1(참)이니까 continue
        //i=3일때 i%2=1, 0(거짓)이니까 total+=3
        //규칙: i가 홀수이면 i를 더하고, 짝수이면 continue한다.
        total=total+i;
        //1,3,5,7,9 총합 = 25 출력
    }
    printf("%d\n", total); //25 출력
}

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