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Objective-C基础入门（循环）

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for语句

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int main (int argc, char * argv[]) {    
    @autoreleasepool {   
        int n, triangularNumber;
        triangularNumber = 0;
        for ( n = 1; n <= 200; n = n + 1 )          
            triangularNumber += n;
            
        NSLog (@"The 200th triangular number is %i", triangularNumber);   
    }
    return 0; 
}

其中
for ( n = 1; n <= 200; n = n + 1 )
也可以改为
for ( n = 1; n <= 200; ++n)

while语句

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int main (int argc, char * argv[]) {   
    @autoreleasepool {      
        int count = 1;
        
        while ( count <= 5 ) {      
            NSLog (@"%i", count);        
            ++count;  
        }   
    }
    return 0; 
}

do语句

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int main (int argc, char * argv[]) {   
    @autoreleasepool {     
        int number, right_digit;
        NSLog (@"Enter your number.");    
        scanf ("%i", &number);
        do {         
            right_digit = number % 10;    
            NSLog (@"%i", right_digit);   
            number /= 10;
        }     
        while ( number != 0 ); 
        }
    return 0; 
}

break语句

终止循环，离开整个循环嵌套

continue语句

离开当前循环，继续下一个循环