C++ Program to Find the Number of Digits from any number
is today’s topic of discussion in this tutorial.
Flowchart of C++ Program to Find the Number of Digits of a number
Example: When the total digits a number are 1
Example: When the total digits a number are 2
C++ Program to Find the Number of Digits Using while loop
#include<iostream>
using namespace std;
int main()
{
int num;
int a=0;
cout<<"Please Enter any number : ";
cin>>num;
while(num>0)
{
num=num/10;
//
a++;
}
cout<<"Number of digits in given number is: "<<a;
}
Output
Please Enter any number : 4
Number of digits in given number is: 1
——————————–
With Comments – Program to find the length of a number in C++ (CPP)
#include<iostream>
//adding the header file
using namespace std;
//adding the namespace
int main()
//main function
{
//start of main
int num;
// integer type variable num declaration
int a=0;
// integer type variable a declaration and initialziation with 0
cout<<"Please Enter any number : ";
//display message same to same
cin>>num;
//take value of variable num from the user.
while(num>0)
//loop
{
num=num/10;
//divide the number with 10, and the result will be 5698/10 = 570
//divide the 570 with 10, and the result will be 570/10 = 57
//divide the 57 with 10, and the result will be 57/10 = 6
//divide the 6 with 10. and the result will be 6/10 = 0
a++;
//increment the loop
}
//ending of loop
cout<<"Number of digits in given number is: "<<a;
//display message and print the variable of variable a
}//ending of main function
Output:
Program of Length of a Number in C++ Using Do While Loop (only for positive values)
Let’s begin with “Program of Length of a Number in C++ Using Do While Loop only for positive values”.
#include<iostream>
using namespace std;
int main()
{
int num;
int i;
cout<<"Please enter a number to find its length"<<endl;
cin>>num;
do
{
num=num/10;
i++;
}
while(num>0);
cout<<"the length of the number is = "<<i<<endl;
system("pause");
}
Output
Please enter a number to find its length
545
the length of the number is = 3
Program of Length of a Number in C++ Using For Loop (only for positive values)
Let’s begin with “Program of Length of a Number in C++ Using For Loop only for positive values”.
#include<iostream>
using namespace std;
int main()
{
int num;
int i;
cout<<"Please enter a number to find its length"<<endl;
cin>>num;
for(;num>0; i++)
{
num=num/10;
}
cout<<"the length of the number is = "<<i<<endl;
system("pause");
}
Output
Program of Length of a Number in C++ Using Functions
Let’s begin with “Program of Length of a Number in C++ Using Functions”.
#include<iostream>
using namespace std;
int length(int,int&);
int main()
{
int n;
int p;
cout<<"Please enter a number to find its length"<<endl;
cin>>n;
length(n,p);
cout<<"the length of the number is = "<<p<<endl;
system("pause");
}
int length(int num, int &i)
{
i=0;
do
{
num=num/10;
i++;
}
while(num>0);
}
Program of Length of a Number in C++ Using Nested if Statement
Let’s begin with “Program of Length of a Number in C++ Using Nested If Statement”.
#include<iostream>
using namespace std;
int main()
{
int num;
int i;
for(int g=0; g<1;)
{
cout<<"Please enter a number to find its length"<<endl;
cin>>num;
if(num!=0)
{
for(int p=0; p<1;)
{
if(num!=0)
{
num=num/10;
i++;
}
else
{
p++;
}
}
g=1;
cout<<"the length of the number is = "<<i<<endl;
system("pause");
}
else
{
cout<<"Please enter non-zero integers.."<<endl;
}
}
}
Program of Length of a Number in C++ Using for loop and if Statement
Let’s begin with “Program of Length of a Number in C++ Using for loop and If Statement”.
#include<iostream>
using namespace std;
int main()
{
int num;
int i;
cout<<"Please enter a number to find its length"<<endl;
cin>>num;
for(int p=0; p<1;)
{
if(num!=0)
{
num=num/10;
i++;
}
else
{
p++;
}
}
cout<<"the length of the number is = "<<i<<endl;
system("pause");
}
Program of Length of a Number in C++ Using While Loop
Let’s begin with “Program of Length of a Number in C++ Using while loop”.
Program to find the length of a number in C
#include<iostream>
using namespace std;
int main()
{
int num;
int i;
cout<<"Please enter a number to find its length"<<endl;
cin>>num;
for(;num>0; i++)
{
num=num/10;
}
cout<<"the length of the number is = "<<i<<endl;
system("pause");
}
#include<stdio.h>
int main()
{
int num;
int a=0;
printf("Please Enter any number : ");
scanf("%d" , &num);
while(num>0)
{
num=num/10;
a++;
}
printf("Number of digits in given number is: %d", a);
}
With Comments – Program to find the length of a number in C++ (CPP)
#include<stdio.h>
//adding the header file
int main()
//main function
{
//start of main function
int num;
// declaration of integer type variable num
int a=0;
// declaration of integer type variable a and initializing the a with 0
printf("Please Enter any number : ");
//display the message
scanf("%d" , &num);
//takes the integer type value from the user as input
while(num>0)
// loop
{
//start of loop
num=num/10;
//divide the number with 10, and the result will be 5698/10 = 570
//divide the 570 with 10, and the result will be 570/10 = 57
//divide the 57 with 10, and the result will be 57/10 = 6
//divide the 6 with 10. and the result will be 6/10 = 0
a++;
//increment the loop
}
//ending of loop
printf("Number of digits in given number is: %d", a);
//print the message with value of a
}
//ending the main function