C Basic Syntax ———— while statement

1. While is the loop flow control, the standard format used is

   while (expression)

   {

   Loop statement body;

   }

2. Description: The expression for the ①while loop is a cyclic condition, and the expression used as a loop condition generally includes at least one variable that can change the expression, which is called the loop variable

   ② when the value of the expression is true (not 0), the loop body is executed and the loop ends when False (0).

   ③ when the loop body does not need to implement any function, you can use the empty statement as the loop body

   ④ the initialization of the loop variable should be preceded by the while statement, and the loop variable can be assigned an initial value in the appropriate way

C Basic Syntax ———— while statement