Indent

#include <stdio.h>

int main(void) {
    int i;
    for(i=0; i<5; i++) {
    printf("%d", i);          // press [>] [j] in this line
    printf("---");
    }
        return 0;             // press [<] [<] in this line
}

// will result

#include <stdio.h>

int main(void) {
    int i;
    for(i=0; i<5; i++) {
        printf("%d", i);
        printf("---");
    }
    return 0;
}

# suppose now in --insert mode--
def funny():                 # press [Enter] to auto-indent.
    if input() != '':        # [Enter] for another +indent.
        print('something')   # [Enter] now give same indent.
        print('detected')    # to -indent depth:
        print('but lost')    # press [Enter] and [Ctrl]+[d].
    print('just kidding')

    #include <stdio.h>

int main(void) {
  int i;
 for(i=0; i<5; i++) {
     printf("%d", i);
   if(i>3) {
  break;
     }
 }
       return 0;
}

// cursor at the 1st line
// press [=] [G]

#include <stdio.h>

int main(void) {
    int i;
    for(i=0; i<5; i++) {
        printf("%d", i);
        if(i>3) {
            break;
        }
    }
    return 0;
}

public static void main(string[] args)
//                      ^ press [~]

public static void main(String[] args)