In Objective-C, break is a control statement used in loops to terminate the loop and transfer control to the statement immediately following the loop. The break statement can be used with all loop types – for, while, and do-while.
Here's an example that shows how to use break in a for loop:
``objective-c
for (int i = 0; i < 10; i++) {
if (i == 5) {
break;
}
NSLog(@"%d", i);
}
Output:
0
1
2
3
4
In this example, the for loop increments the value of i by 1 each time the loop executes. The if statement checks if i is equal to 5. If i is equal to 5, the break statement is executed. This terminates the for loop and control is transferred to the statement immediately following the loop.
Here's another example that shows how to use break in a while loop:
objective-c
int i = 0;
while (i < 10) {
if (i == 5) {
break;
}
NSLog(@"%d", i);
i++;
}
Output:
0
1
2
3
4
`
In this example, the loop increments the value of i by 1 each time the loop executes. The if statement checks if i is equal to 5. If i is equal to 5, the break statement is executed. This terminates the while loop and control is transferred to the statement immediately following the loop.
In both examples, the
break` statement is used to terminate the loop prematurely, avoiding unnecessary iterations when a certain condition is met.