C++ Vector resize()

It modifies the size of the vector to the specified value

Size changed to 4 and new value is

Syntax

Consider a vector v. Syntax would be:

Parameter

n : It is the new vector size.

val : If n is greater than the current vector size, then value(val) is inserted in the added space.

Return value

It does not return any value.

Example 1

Let's see a simple example when n is less than the current vector size.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
	vector<int> v;
	for(int i=1;i<=10;i++)
	{
	v.push_back(i);
	}
	cout<<"Initial elements are :";
	for(int i=0;i<v.size();i++)
	cout<<v[i]<<" ";
	v.resize(5);
	cout<<'\n';
	cout<<"After resizing its size to 5,elements are :";
	for(int i=0;i<v.size();i++)
	cout<<v[i]<<" ";
	return 0;
}

Output:

     Initial elements are: 1 2 3 4 5 6 7 8 9 10 
After resizing its size to 5, elementsare: 1 2 3 4 5

Example 2

Let's see a simple example n is greater than the current vector size.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
	vector<string>  v1{"java","C","C++"};
	cout<<"Elements of v1 are :";
	for(int i=0;i<v1.size();i++)
	cout<<v1[i]<<" ";
	v1.resize(5,".Net");
	for(int i=0;i<v1.size();i++)
	cout<<v1[i]<<" ";
	return 0;
}

Output:

Elements of v1 are :java C C++ java C C++ .Net .Net

Next TopicC++ Vector

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