1. G6DICP - Lecture 5
Control Structures

2. Loops A block of code is repeated
A pre-defined number of times
Until a certain (boolean) condition is met
Determinate vs indeterminate
The contents of variables often change in each cycle.
Beware of perpetual loops!

3. For Loops
Probably the most common type of loop. for ( starting condition; continuing condition; change each cycle ) for ( a=1; a<=10; a++ ) { ... }

4. While Loops
while (continuing condition) while (a<=10) { ... }

5. Do.. while Loops
do { } while (continuing condition) do { } while (a<=10)

6. Switch switch (answer) { case ‘y’ : { ... } case ‘n’ : { ... }
default : { ... } }
case ‘y’ : { ... }; break;
case ‘n’ : { ... }; break;
default : { ... }; break;