For and While Loops
Name___________________________
/**
* Simple "for loop" examples
*/
int x;
for(x=1; x<11; x=x+1)
{
System.out.println("Count is: " + x);
}
System.out.println("The value of x after the loop is: " + x);
for(int i=1; i<11; i++)
{
System.out.println("Count is: " + i);
}
System.out.println("The value of i after the loop is: " + i);
/**
* Basic nested loop
*/
for(int x=1; x<5; x++)
{
System.out.print(x + " (");
for (int y=1; y<=3; y++)
{
System.out.print(y);
}
System.out.println(")");
}
/**
* Here's how they mess with you
*/
for(int i=1; i<=5; i++)
{
for (int j=1; j<i; j++)
System.out.print("-");
for (int k=i; k<=5; k++)
System.out.print("|");
System.out.println("");
}
/**
* A simple "while loop" example.
*/
int count = 1;
while (count < 11)
{
System.out.println("Count is: " + count);
count++;
}
Examples of break and continue and other unstructured bad ideas
/**
* You are "allowed" to change the loop control variable
* inside the loop, but please DON'T
*/
for(int z=1; z<11; z++)
{
z = z + 2; // Don't do this!!!
System.out.println("Count is: " + z);
}
/**
* If the keyword break is executed inside a for-loop, the loop is immediately
* exited (regardless of the control statement). Execution continues with
* the statement immediately following the closing brace of the for-loop.
*/
for (int y=1; y<3; y++)
for (int count = 1; count <= 10; count++)
{
if (count == 6)
{
break; // Don't do this!!! Not part of the AP subset
}
System.out.println(count);
}
/**
* If continue is encountered inside any loop, all remaining code in the loop
* is skipped for this particular iteration; however, looping continues in
* accordance with the control expression.
*/
for (int count = 1; count <= 10; count++)
{
if (count == 6)
{
continue; // Don't do this!!! Not part of the AP subset
}
System.out.println(count);
}