Lesson 7: iteration

Back to GT CS-1331

while Loops:

• Runs a snippit of code until a condition evaluates to false

  • If the condition stays true, it creates an infinite loop

    • Ctrl-C can force quit the program

• Can use a counter to track iterations

while (booleanExpression){
    statement1; //brackets not needed if there is only one statement
    statement2;
}

do-while Loops:

• While loop but ensures that one interation is done

do {
 statement1;
 statement2;
} while(booleanExpression);

for Loop:

• While loop but better in some ways

for(initStatement; condition; updateStatement) {
    statement1;
    statement2;
}

Nested Loops:

• Can put loops into one another to solve more complex problems

• Similar to nested if statements

The break Statement:

• Can be used in both for and while loops

• Can be used with if-else

• Exits a loop

The continue Statement:

• Can be used in both for and while loops

• Can be used with if-else

• Skips iteration and starts a new loop