Here, for every value in thecollection, the for loop is executed and the value is assigned to thevariable. Example 4: Range Based for Loop #include<iostream>usingnamespacestd;intmain(){intnum_array[] = {1,2,3,4,5,6,7,8,9,10};for(intn : num_array) {cout<< n <<" "; }ret...
If the loop needs to be terminated withinstatement, abreakstatementcan be used as terminating statement. If the current iteration needs to be terminated withinstatement, acontinuestatementcan be used as shortcut. Notes As is the case withwhileloop, ifstatementis not a compound statement, the sco...
for(inti =0; i <5; i++) { cout << i <<"\n"; } Try it Yourself » Example explained Statement 1 sets a variable before the loop starts:int i = 0 Statement 2 defines the condition for the loop to run:i < 5. If the condition is true, the loop will start over again, if...
Note that a vector in C++ is a dynamic array that can store multiple elements of the same type—in this case, integers. We then use a range-based for loop to iterate over each element in the numbers vector: In the loop header int number : numbers means that for each iteration, the ...
Output: i = 0 i = 1 i = 2 Originally, C++ only had the type offorloop described above. C++11 added the "range-basedforloop" for arrays and containers, which looks like:for(/*variable-declaration*/:/*container or array*/)
The foreach LoopThere is also a "for-each loop" (also known as ranged-based for loop), which is used exclusively to loop through elements in an array (or other data structures):Syntax for (type variableName : arrayName) { // code block to be executed } ...
Working of ranged for loop in C++ Example 1: Ranged for Loop Using Array #include<iostream>usingnamespacestd;intmain(){// initialize arrayintnumArray[] = {1,2,3,4,5};// use of ranged for loop to print array elementsfor(intn : numArray) {cout<< n <<" "; ...
// for_statement5.cpp int main() int i = 0; // hidden by var with same name declared in for loop for ( int i = 0 ; i < 3; i++ ) for ( int i = 0 ; i < 3; i++ ) 这更类似于 for 循环中声明的变量的标准行为,后者要求 for 循环中声明的变量在循环完毕后超出范围。在 for...
int my_array[5] = {1, 2, 3, 4, 5}; // 每个数组元素乘于 2 for (int &x : my_array) { x *= 2; cout << x << endl; } // auto 类型也是 C++11 新标准中的,用来自动获取变量的类型 for (auto &x : my_array) { x *= 2; cout << x << endl; }上面for述句的第一部分...
:cout << '\n'; int a[] = {0, 1, 2, 3, 4, 5}; for (int n : a) // the initializer may be an array std::cout << n << ' '; std::cout << '\n'; for (int n : a) std::cout << 1 << ' '; // the loop variable need not be used std::cout << '\n'; ...