How to remove the last comma in comma separated prime numbers within a range?

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I have the code for finding prime numbers within a range.

The problem is to remove the last comma.

#include<stdio.h>

int main()
{
    int a,b,i,x,c,f=1;
    scanf("%d%d",&a,&b);
    for(x=a;x<=b;(x++,f=0))
    {

        for(i=2;i<x;i++)
        {
            if(x%i==0)
            {
                 f=1;
            }
        }

        if(f==0)
            printf("%d,",x);
     }
  }

But the output contains an extra comma in the last. For example

2,3,5,7,

whereas the expected output is

2,3,5,7

#include<stdio.h>

int main()
{
    int a,b,i,x,c,f=1;
    char backspace = 8;

    scanf("%d%d",&a,&b);
    for(x=a;x<=b;(x++,f=0))
    {

        for(i=2;i<x;i++)
        {
            if(x%i==0)
            {
                 f=1;
            }

        }
        if(f==0)
           printf("%d,",x);
     }
     printf("\b"); // or printf("%c", backspace);
  }

C Program Print a comma-separated list of numbers from 1 to 10, by Dinesh Thakur Category: Control Structures. The if statement within the body of the for loop is used to print a comma after each value of the loop variable except the last one. C Program Prints Prime Numbers in a given range m to n  This is more of a "language-agnostic" problem: "How do I output a comma-separated list without a final comma?" It is not specifically about prime numbers. You seem to be thinking of you list as a series of [prime comma] units. It isn't.

Instead of flag you can decide directly what you want to print between numbers

And note that you can break out of the internal loop as soon as f is set to 1

#include<stdio.h>

int main()
{
    int a,b,i,x,c,f=1;
    const char* delim = "";
    scanf("%d%d",&a,&b);
    for(x=a; x<=b; (x++,f=0))
    {
        for(i=2; i<x; i++)
        {
            if(x%i==0)
            {
                f=1;
                break; //no need to continue the checking
            }
        }

        if(f==0) {
            printf("%s%d",delim,x);
            delim = ", ";
        }
    }
    putchar('\n');
}

How do I remove comma after last number/output loop in C++ , You could write the if-else logic like this : Hide Copy Code. if( ( a % 3 == 0 ) && ( a % 2 != 0 ) ) { cout << a; if( a == b ) cout << "."; else cout << " , "  Java: Removing trailing comma from comma separated string. Here's how: str = str. replaceAll (", $", ""); This handles the empty list (empty string) gracefully, as opposed to lastIndexOf / substring solutions which requires special treatment of such case. Note that this assumes that the string ends with , (comma followed by space).

Add another flag, just a simple counter that tells you if you are printing the first time then check the flag to decide what to print, e.g.

#include<stdio.h>

    int main()
    {
        int a,b,i,x,c,first=0,f=1;
        scanf("%d%d",&a,&b);
        for(x=a;x<=b;(x++,f=0))
        {

            for(i=2;i<x;i++)
            {
                if(x%i==0)
                {
                     f=1;
                }
            }

            if(f==0)
                {
                    if(first==0){
                        printf("%d",x);
                    }else{
                        printf(",%d",x);
                    } 
                    first++
                }
         }

  }

How to split a string between letters and digits java, It also shows how to remove special characters from the string. Pattern: The pattern "\D+" indicates that we want to use any number of one or You can find a regular expression which will split on digits, or you can use a matching method, find out the index of the last Program to split a string in java with delimiter comma. oh I only need to remove the last comma from one file. And I have some whitespace at the end so its not working. – yesco1 Aug 6 '15 at 15:43 sed 's/\(.*\),/\1/' file will remove last , in all lines in the file. – jimmij Aug 6 '15 at 15:50

Use a flag to detect the first occurrence of printf() and print the first number as such without any ,. For consecutive number printing precede with ,

#include<stdio.h>

int main()
{
    int a,b,i,x,c,f=1,flag=0;//Flag to mark first occurrence
    scanf("%d%d",&a,&b);
    for(x=a;x<=b;(x++,f=0))
    {

        for(i=2;i<x;i++)
        {
            if(x%i==0)
            {
                 f=1;
                 break;// Once the condition fails can break of the for loop as it fails for the prime number condition at the first case itself
            }

        }
            if(f==0)
            {
            if(flag==0)
            {//Check if it is first time
                printf("%d",x);
                flag = 1;//If so print without ',' and set the flag
            }
            else
                printf(",%d",x);// On next consecutive prints it prints using ','
            }
        }
  }

This method also avoids the , when only one number is printed.

Eg: When input is 2 and 4. It prints just 3 and not 3,

range - Manual, (PHP 4, PHP 5, PHP 7). range — Create an array containing a range of elements eliminate floats and others numbers not are equal 1 and own number here we want only array with 2 indexes with the values 1 and own number (rule to a natural prime number) Remove any commas or hypens from the end of the string Concatenate cell range, separate with comma except for empty cells It is to my understanding that MoreFunc does not work with excel 2013 (or 2010 for that matter). And so I am looking to a formula similar to MCONCAT that will take the cell range C40:C57 and put the text that is is in each cell ad concantinate it, but seperating them with commas.

Simply you need odd number best practice for minimum loop is given below;

#include<stdio.h>
int main()
{
    int a,b,i,x,c,f=1;
    scanf("%d%d",&a,&b); 

    while (a < b) 
    {
        if ( (a%2) == 1) {
           printf("%d", a);
           if ( (a + 1) < b && (a + 2) < b)
               printf(",");
        }
        a = a + 1;
    } 
}

please check from the site http://rextester.com/MWNVE38245

Print all prime numbers less than or equal to N, If it is a prime number, print the number. Below is the implementation of the above approach:. GUY'Z i am sharing funny incident while solving this query you will enjoy to watch it How to Remove Comma from Numbers using Find and Replace options #RemoveComma #ExcelFunnyFeatures #

Python program to print all Prime numbers in an Interval , The task is to write a Python program toprint all Prime numbers in an Interval. Definition: A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Please see print prime numbers in a range for details. matplotlib in Python · Python program to input a comma separated string. 3. Remove the curly braces {and } from the formula, and press the Enter key. See screenshot: Note: In above formula, B1:J1 is the row you will concatenate, and "," means you will separate each cell content by comma. For separating by space, please replace the "," with “ “ in the formula.

How to print in Java 1 to 100 with commas, What is the simplest way to remove the last comma of a String in Java? How can the number of times that a word is being repeated in a string be found out  Java split string by comma example shows how to split string by comma in Java. The example also shows how to handle CSV records having a comma between double quotes or parentheses. How to split String by comma in Java? You can split string by comma in Java using the split method of the String class.

How can I remove the last comma from a loop in C++ in a simple way?, This program is for printing prime numbers till the input given and separating every prime number with a comma. void main(){ int N, counter=0, isPrime; int k, j;​  The steps in this article will show you how to change the formatting for a selection of numbers in your Excel spreadsheet so that those numbers display without a comma. Step 1: Open your spreadsheet in Excel 2013. Step 2: Select the cells containing numbers that have commas.

Comments
  • Just do not print it? Then there'd be no need to remove it.
  • Print "2" (or whichever is first), then print ",%d" for each following prime.
  • That's the desired output.
  • Why not? Just print the first one you find without a comma, all others after a comma.
  • Of course, if the numbers weren't prime, it would be a totally different problem.
  • This is a C question. Not a C++ one.
  • Yeah but the logic remains same Please just change the c++ keywords to c for your reference