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--- notes:cprog:spring2024:projects:cnv0 [2024/03/05 00:38] – [for() loops] cgrant9
+++ notes:cprog:spring2024:projects:cnv0 [2024/03/06 20:54] (current) – [do-while loops] amelvil2
@@ Line 33: / Line 33: @@
     whatever you want to happen;
 } </code>
-====while() loops====
+An example of a for loop that shows what iteration the loop is on, i.e Iteration: 0, Iteration: 1, etc. until it reaches Iteration: 9 and ends the loop:
+<code>int i;
+for (i = 0; i < 10; i++) {
+    printf("Iteration: %d\n", i);
+}</code>
+====while() loops====
+A while loop is a loop that continues to iterate as long as the input evaluates to true.
+a while loop that iterates until an input variable reaches some designated value may look like:
+<code>while (var != 100) {
+    whatever you want it to do;
+    }</code>
+If you arent careful with your condition a while loop will iterate endlessly, preventing your code from moving past the loop
+<code>unsigned int var = 0;
+var = 20;
+while (var == 20){
+    do something that doesnt effect var;
+    }
+the rest of your code;</code>
+In this case, because var never changes from 20, the while loop will never end
+You can also achieve this endless iteration by typing
+<code> while (true) {
+    some code;
+    }</code>
+Because the condition is always true it will never escape the loop
 ====do-while loops====
+A do-while loop issues commands then checks the condition rather than checking the condition and then issuing the commands.
+<code>
+int i = 5;
+do
+{
+    i--;
+} while ( i > 0 )
+</code>
+An example of a do-while loop being used. This loop will check if the user has inputted the correct password. The loop will continue until number equals 1234:
+<code>
+int number;
+do {
+    printf("Enter the password: ");
+    scanf("%d", &number);
+} while (number != 1234);
+</code>

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