For Loop Execution Process, for loop Process

For Loop Execution Process, for loop Process

Statement format:

For (expression 1; expression 2; expression 3)

{

Loop body

}

Expression 1: Value assignment expression, which is used to assign an initial value to the control variable.

Expression 2: A logical expression is the control condition of a loop. It is used to determine whether the control variable meets the cycle condition. If yes, it enters the loop body. Otherwise, it jumps out of the loop.

Expression 3: A value expression used to increment or decrement control variables.

 For Loop execution steps:

Step 1: Initialize the control variable to determine whether the control variable meets the cycle condition (expression 1-> Expression 2). If yes, it enters the loop body; otherwise, it exits the loop.

Step 2: update the control variable, perform increment or decrement operations on the control variable, and then determine whether the control variable meets the conditions (expression 3-> Expression 2). If the conditions are met, the variable enters the loop body, otherwise, exit the loop.

Step 3: Continue Step 2 until you exit the loop

# Include <stdio. h> int main () {int I; for (I = 0; I <10; I ++) {printf ("% d \ n", I );} printf ("% d \ n", I); return 0 ;}

According to the above analysis, when I does not meet the condition I <10, it jumps out of the loop (that is, when I = 10), so when I is used after jumping out of the loop, I is already 10!