For loop not running

Question

I've been trying to get a for loop to run 9 times using the below code but can't get the loop to run.

void output() {
 int r;
 r = 1;
 Serial.println("Output");
 digitalWrite(Latch, LOW);
 for (int r=1; r >= 9; r = r + 1) {
 Serial.println("Test");
 digitalWrite(DataOutput, Q[r]);
 digitalWrite(ClockPin, HIGH);
 digitalWrite(ClockPin, LOW);
 }
 Serial.println("Done For");
 digitalWrite(Latch, HIGH);
 digitalWrite(Latch, LOW);
}

Answer 1

Change

for (int r=1; r >= 9; r = r + 1) {

to

for (int r=1; r <= 9; r = r + 1) {

The for loop will only run while the second part is true.

Answer 2

The middle expression r => 9 in the for loop is wrong. This will only loop whilst r is greater than 9 and you are starting from r = 1. Change it to r <= 9.