PHP Taskbook Level 1.5

Задание 1

Find the sum of all integers from 1 to 100.

Задание 2

Find the sum of all even integers between 1 and 100.

Задание 3

Find the sum of all odd integers between 1 and 100.

Задание 4

Given two integers, find the remainder of the first number divided by the second.

Задание 5

Given a string, iterate over and output to the console one by one all the characters from the end of the string.