Expected primary-expression before "<=" token

Projects Programming
1

NEW TO ARDUINO AND FORUM:

I don't understand what the phrase 'Expected primary-expression' means. My web search didn't help... I'm new to Arduino and this language.

int yelLed=6;

int redLed=9;

int yelTime=500;

int redTime=500;

int yelBlink=3;

int redBlink=5;

int j;

void setup() {

// put your setup code here, to run once: {

pinMode(yelLed,HIGH);

pinMode(redLed,HIGH);

Serial.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly: {

for(j=1;<=yelBlink;j=j+1) {

digitalWrite(yelLed,HIGH);

delay(yelTime);

digitalWrite(yelLed,LOW);

delay(yelTime);

}

for(j=1;<=redBlink;j=j+1) {

digitalWrite(redLed,HIGH);

delay(redTime);

digitalWrite(redLed,LOW);

delay(redTime); }

ERROR COMMENT:

In function 'void loop()':

Blink_Yel_Red_Long:19:9: error: expected primary-expression before '<=' token

for(j=1;<=yelBlink;j=j+1){

^~

Blink_Yel_Red_Long:27:10: error: expected primary-expression before '<=' token

for(j=1;<=redBlink;j=j+1){

^~

exit status 1

expected primary-expression before '<=' token

2

Did you try for(int j=1;<=yelBlink; j++)?

3

for(j=1;xxxx<=yelBlink;j=j+1) {

It means there's something missing where I marked the xxxx above.

Compare yours to this from the ref man:

for (int i = 0; i <= 255; i++) {
4

Both of these solutions worked to remove the error message. Oddly, even with the error message, the program still ran the LEDs as intended. ???

5

Hello
What is the intendition?

6

If the compile fails, the upload is not attempted, and the Arduino is left running the previously loaded sketch.