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C++ Program to Find the Length of a String
A string is a one dimensional character array that is terminated by a null character. The length of a string is the number of characters in the string before the null character.
For example.
char str[] = “The sky is blue”; Number of characters in the above string = 15
A program to find the length of a string is given as follows.
Example
#include<iostream>
using namespace std;
int main() {
char str[] = "Apple";
int count = 0;
while (str[count] != '\0')
count++;
cout<<"The string is "<<str<<endl;
cout <<"The length of the string is "<<count<<endl;
return 0;
}Output
The string is Apple The length of the string is 5
In the above program, the count variable is incremented in a while loop until the null character is reached in the string. Finally the count variable holds the length of the string. This is given as follows.
while (str[count] != '\0') count++;
After the length of the string is obtained, it is displayed on screen. This is demonstrated by the following code snippet.
cout<<"The string is "<<str<<endl; cout<<"The length of the string is "<<count<<endl;
The length of the string can also be found by using the strlen() function. This is demonstrated in the following program.
Example
#include<iostream>
#include<string.h>
using namespace std;
int main() {
char str[] = "Grapes are green";
int count = 0;
cout<<"The string is "<<str<<endl;
cout <<"The length of the string is "<<strlen(str);
return 0;
}Output
The string is Grapes are green The length of the string is 16
Updated on: 24-Jun-2020
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