The function of the less than operator (<) is to check if the first available operand is lesser than the second one. On the other hand, the function of the less than or equal to operator (<=) is to check if the first available operand is equal to or less than the second one. The same comparison goes for the greater than operator and the greater than or equal to operator.
For example, 5 < 6 will be true and 5 < 5 will be false. But both 5 <= 6 and 5 <= 5 will be true. Here, both 5 < 4 and 5 <= 4 will be false.
Similarly, 7 > 2 will be true and 7 > 7 will be false. But both 7 >= 2 and 7 >= 7 will be true. Here, both 7 > 9 and 7 >= 9 will be false.