Constrains in competative programming

online tutorial i saw int can hold upto10^8. i don’t understnad if
int ranges from –2,147,483,648 to 2,147,483,647.
then int can store 2147483647(highest) and 10^8 = 100000000. highest range is greater then 10^8. i am very new sorry for these type of questions.

The maximum value signed int can hold is 2^{31}-1 which is nearly 2×10^{9}