While loop statement, while loop statement

While loop statement, while loop statement

Note: first, judge the expression and then execute the statement. The while loop is called a "when" loop.

If the specified condition is true (the expression is not 0), execute the embedded statement in the while statement.

Format: while (expression) // determines whether the expression in parentheses is true)

 

{

· Statements executed in a loop

}

 

Example: 1 + 2 + 3 + 4 + 5 + 6... + 100 the sum of consecutive values.

Code:

# Include <vcl. h> # include <iostream> # pragma hdrstop # include <tchar. h> // counter # pragma argsusedusing namespace std; int _ tmain (int argc, _ TCHAR * argv []) {int I = 0; int sum = 0; while (I <= 100) // first judge if the expression is true, execute the loop body {/* loop body */sum = sum + I; I ++ ;} cout <"Result:" <sum <endl; // output result cin. get (); return 0 ;}

 

Example: