#include <stdio.h>

int main() {
    // contare da 1 a 10
    int i;
    for ( i=1 ; i <= 10 ; i = i + 1 ) { // i = i + 1 oppure i+=1 opppure i++
        printf("%d\n",i);
    }
    printf("------------------\n");
    // contare da 10 a 1
    for ( i=10 ; i >= 1 ; i = i - 1 ) { // i -= 1 oppure i--
        printf("%d\n",i);        
    }
    printf("------------------\n");
    // stampare solo i numeri pari da 1 a 10
    for ( i=1 ; i <= 10 ; i = i + 1 ) { // i = i + 1 oppure i+=1 opppure i++
        if( (i % 2) == 0 ) {
            printf("%d\n",i);          
        }
    }   
    printf("------------------\n");
    // stampare solo i numeri multipli di 3 da 1 a 100
        for ( i=1 ; i <= 100    for ( i=1 ; i <= 10 ; i = i + 1 ) { // i = i + 1 oppure i+=1 opppure i++
        if( (i % 2) == 0 ) {
            printf("%d\n",i);          
        }
    }    ; i = i + 1 ) { // i = i + 1 oppure i+=1 opppure i++
        if( (i % 3) == 0 ) {
            printf("%d\n",i);          
        }
    }   
}

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