Logic Gate Implementation

Solving Approach

For the inputs (12, 13) and the outputs (3, 4, 5, 6).

I corrected the INPUT_PULLUP syntax and added missing semicolons.

I corrected the NAND/NOR logic to use the ! (NOT operator) for logic.

I standardized variable names (pinAND instead of pinNMD).

I removed duplicate/incorrect pinMode calls.

I corrected the logic in the digitalWrite statements.

In the wiring:
The switches are connected between GND and pins 12/13 (internal pull-up enabled).
The LEDs are connected each to pins 3-6 (through a current limiting resistor) to show AND/OR/NAND/NOR outputs.

Code

/*Paste your code here*/
const int inputA = 12;
const int inputB = 13;
const int pinAND  = 6;
const int pinOR   = 3;
const int pinNAND = 5;
const int pinNOR  = 4;
void setup() {
pinMode(inputA, INPUT_PULLUP);
pinMode(inputB, INPUT_PULLUP);
pinMode(pinAND, OUTPUT);
pinMode(pinOR, OUTPUT);
pinMode(pinNAND, OUTPUT);
pinMode(pinNOR, OUTPUT);    
}
void loop() {
bool A = (digitalRead(inputA) == LOW);
bool B = (digitalRead(inputB) == LOW);
digitalWrite(pinAND,  (A && B)  ? HIGH : LOW);
digitalWrite(pinOR,   (A || B)  ? HIGH : LOW);
digitalWrite(pinNAND, (!(A && B))? HIGH : LOW);
digitalWrite(pinNOR,  (!(A || B))? HIGH : LOW);
}

Output

Video

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