recck

<?php

/**
 * for loops
 * where to start; when to continue; how to step through
 **/
 
for($i = 0; $i < 10; $i++){
    // start at i = 0 and continue until i is >= 10
    echo $i;

recck

<?php
/**
 * Mathematical Comparison Operators
 * x > y,   is x greater than y?
 * x >= y,  is x greater than OR equal to y?
 * x < y,   is x less than y?
 * x <= y,  is x less than OR equal to y?
 * 
 * Logical Comparison Operators
 * x == y,  does x have the same value as y?

recck

<?php
/**
 * Mathematical Operations
 * Addition, +, 5+2 = 7
 * Subtraction, -, 5-2 = 3
 * Multiplication, *, 5*2 = 10
 * Division, /, 5/2 = 2.5
 * Modulus, %, 5%2 = 1
 * 
 * Short Hand Operations