C language 2

//
// <# Initialization #> variable Initialization
// <# Condition #> cyclic conditions
// <# Increment #> // variable Increment
// <# Statements #> indicates the content that is repeatedly executed each time.

// The Name Of The cyclic variable is dominated by I, j, and K.

// Difference between while and do while
// For A While loop, you must first judge the loop condition and then execute the loop body. For do while, whether or not the condition is true, first execute the loop body and then judge the condition.
// Difference between while and
// While loops are mostly used to indicate the number of loops, while for loops are mostly used to know the number of loops. For loops can be converted to while loops, but while loops cannot be converted to for loops.
// When to use the loop
// When we do the same thing twice or more times, we need to consider using a loop to take repeated operations as the loop body.

Break; // jump out of the current loop, jump out of the current loop, and execute the following statement

Continue; // end this loop, that is, the execution of this loop ends till now, and then execute I ++ to continue the next loop

// Random number, arc4random () random function;
// Calculate the random number in the range of [a, B], arc4random () % (B-A + 1) +;