[Study Notes] [C Language] break and continue, breakcontinue

[Study Notes] [C Language] break and continue, breakcontinue

1. Use

Break:
1. application scenarios
1> switch statement: exit the entire switch statement
2> loop structure: exit the entire loop statement
* While
* Do while
*
2. Notes
Valid only for the latest Loop Structure
 
 Continue:
1. application scenarios
Cycle Structure: end the current cycle body and enter the next cycle body
* While
* Do while
*
2. Notes
Valid only for the latest Loop Structure

2. Code

1 # include <stdio. h> 2 3 int main () 4 {5/* 6 for (int I = 0; I <5; I ++) 7 {8 printf ("% d \ n", I); 9 10 if (I % 2) 11 {// I is an odd number: 1, 312 continue; 13} 14} */15/* 16 for (int I = 0; I <5; I ++) 17 {18 19 printf ("HAHAHA \ n "); 20 21 continue; 22 23 printf ("HAHAHA 23 \ n"); 24} */25 26 for (int I = 0; I <3; I ++) 27 {28 for (int j = 0; j <2; j ++) 29 {30 if (j = 1) 31 {32 break; 33} 34 35 printf ("A \ n"); 36} 37 38 break; 39 40 printf ("B \ n"); 41} 42 43 return 0; 44}

3. Summary

1. Select Structure
1. if
1> Structure
If (condition ){

} Else if (condition 2 ){

} Else if (Condition 3 ){

} Else {

}

2> features
* At the same time, only the code in one braces will be executed.

2. switch
1> Structure
Switch (numeric)
{
Case value 1:
Break;

Case value 2:
Break;

Case value 3:
Break;

Default:
Break;
}
2> features
1> by default, only the code after one case is executed.
2> if there is no break after a case, and this case is true, the statements in all subsequent cases will be executed in sequence until the break is encountered.
3> to define a new variable after case, you must wrap it in braces {}.

Ii. Loop Structure
1. while
1> features: if the initial condition is not true, the loop body will never be executed.
2. do while
1> features: the loop body is executed at least once no matter whether the conditions are true or not.
3.
4. Select
1> generally, for loop is preferred.
2> then consider
3> do while