C Programming —Nested Loops

for loop

The for loop groups together initialization, condition and increment/decrement.

for (initialization; condition; increment) 
     sequence

nested for loop

for ( init; condition; increment ) {

   for ( init; condition; increment ) {
      statement(s);
   }
   statement(s);
}

while loop

As long as the test condition is true, this construct continues to execute.

while (condition)
         sequence

nested while loop

while(condition) {

   while(condition) {
      statement(s);
   }
   statement(s);
}

do while loop

Executes its sequence at least once and continues as long as the test condition is true.

do
         sequence
 while (condition);

nested do while loop

do {
   statement(s);

   do {
      statement(s);
   } while (condition);

} while (condition);