Final answer:
Modifying the control variable of a for loop can cause errors. This is because it can disrupt the loop's flow, leading to unexpected results or infinite loops.
Step-by-step explanation:
Modifying the control variable of a for statement in the body can indeed lead to errors. This statement is true. Modifying the control variable within the loop body can disrupt the logical flow of the loop, potentially leading to unexpected behavior or infinite loops. Therefore, unless intentionally done for a specific purpose, altering the control variable during the execution of the for loop is generally advised against in programming.