No operation is executed. The TML program will continue with the next instruction. The NOP instruction may be used to introduce a delay between two instructions.
Example
Var1=100;
LOOP: // execute a 100 times a loop
Var1-=1; // decrement Var1 by 1
NOP; // no operation
GOTO LOOP, Var1, GEQ; // stay in loop if Var1 >= 0