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C Program To Calculate Sum of Natural Numbers Between Range using For Loop

Lets write a C program to calculate sum of all natural numbers between the user entered range of numbers, using for loop.

We check if the user has entered smaller number first and then the larger number. If not, we swap the numbers present in the variables min and max.

Video Tutorial: C Program To Calculate Sum of Natural Numbers Between Range using For Loop

YouTube Link: https://www.youtube.com/watch?v=TnGRAxjWpHg [Watch the Video In Full Screen.]

Source Code: C Program To Calculate Sum of Natural Numbers Between Range using For Loop

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#include<stdio.h>
int main()
{
int min, max, temp, count, sum = 0;
printf("Enter 2 positive numbers\n");
scanf("%d%d", &min, &max);
if(min > max)
{
temp = min;
min = max;
max = temp;
}
printf("\nNatural Numbers from %d to %d are:\n", min, max);
for(count = min; count <= max; count++)
{
printf("%d\n", count);
sum = sum + count;
}
printf("Sum of Natural Numbers from %d to %d is %d\n", min, max, sum);
return 0;
}

 
#include<stdio.h>

int main()
{
    int min, max, temp, count, sum = 0;

    printf("Enter 2 positive numbers\n");
    scanf("%d%d", &min, &max);

    if(min > max)
    {
        temp = min;
        min  = max;
        max  = temp;
    }

    printf("\nNatural Numbers from %d to %d are:\n", min, max);

    for(count = min; count <= max; count++)
    {
        printf("%d\n", count);
        sum = sum + count;
    }

    printf("Sum of Natural Numbers from %d to %d is %d\n", min, max, sum);

    return 0;
}

Output 1:
Enter 2 positive numbers
5
10

Natural Numbers from 5 to 10 are:
5
6
7
8
9
10
Sum of Natural Numbers from 5 to 10 is 45

Output 2:
Enter 2 positive numbers
14
10

Natural Numbers from 10 to 14 are:
10
11
12
13
14
Sum of Natural Numbers from 10 to 14 is 60

Logic To Calculate Sum of Natural Numbers Between Range using For Loop

We ask the user to enter minimum and maximum number(i.e., the range) and we store it inside variable min and max. If value of min is greater than value of max, then we swap the values of min and max.

We initialize the variable count to min and iterate through the for loop until count value is less than or equal to value of max. We keep incrementing the value of count by 1 for each iteration of for loop.

Inside for loop we add the value of count to previous value of sum and once the control exits the for loop we display the value present in variable sum.

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Print Natural Numbers Between Two Numbers using for loop

Lets write a C program to print natural numbers between two user entered numbers, using for loop.

We check if the user has entered smaller number first and then the larger number. If not, we swap the numbers present in the variables min and max.

C Program To Find Factorial of a Number using for Loop

YouTube Link: https://www.youtube.com/watch?v=mF0o3LC1its [Watch the Video In Full Screen.]

Source Code: C Program to Print Natural Numbers Between Two Numbers using for loop

view plain copy to clipboard print ?

#include<stdio.h>
int main()
{
int min, max, temp, count;
printf("Enter 2 positive numbers\n");
scanf("%d%d", &min, &max);
if(min > max)
{
temp = min;
min = max;
max = temp;
}
printf("Natural numbers from %d to %d are:\n", min, max);
for(count = min; count <= max; count++)
{
printf("%d\n", count);
}
return 0;
}

 
#include<stdio.h>

int main()
{
    int min, max, temp, count;

    printf("Enter 2 positive numbers\n");
    scanf("%d%d", &min, &max);

    if(min > max)
    {
        temp = min;
        min  = max;
        max  = temp;
    }

    printf("Natural numbers from %d to %d are:\n", min, max);

    for(count = min; count <= max; count++)
    {
        printf("%d\n", count);
    }

    return 0;
}

Output 1:
Enter 2 positive numbers
10
15
Natural numbers from 10 to 15 are:
10
11
12
13
14
15

Output 2:
Enter 2 positive numbers
15
10
Natural numbers from 10 to 15 are:
10
11
12
13
14
15

Logic To Print Natural Numbers Between Two Numbers using for loop

We ask the user to enter 2 numbers, and store it inside variables min and max. For loop keeps iterating till min is less than or equal to max. We assign the value of min to count and keep incrementing the value of count by 1 for each iteration of the for loop. Once value of count is greater than value of max, control exits for loop.

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

progress Element: HTML5

Lets look at the progress element of HTML5.

You could implement this progress element of HTML5 with the file upload or the user form filling etc, to indicate the amount of upload or the profile completion.

HTML file
index.html

< !DOCTYPE html>
<html>
<head>
<title>progress Element: HTML5</title>
<link href="myStyle.css" rel="stylesheet"/>
</head>
<body>
 
<form>
<label>Progress: </label>
 <progress value="50" max="100">50%</progress>
</form>
 
</body>
</html>

Here we have a progress element, with 100 as max and 50 as it’s value. This way, the progress bar indicates that the progress is 50% complete. Also there is a text between the progress tag, which is used as a fall back text for browsers which do not yet support progress element of HTML5.

CSS file associated with this is same as present at pattern and title Attribute of Form Field: HTML5

progress element – progress bar: HTML5

YouTube Link: https://www.youtube.com/watch?v=s1tfYfCpZx8 [Watch the Video In Full Screen.]

Change the number present in value and max attribute and look at the visual effect/indication of the progress on the browser.

Note: In real time application development, you could fetch the numbers for value and max attribute dynamically using JavaScript. This way, the effects will be real and it creates the illusion that the progress is being made!

date time Input Type: HTML5

Today lets learn some very important input types of HTML5:

datetime
datetime-local
date
time
week
month

datetime input type is supported by Opera browser, but as of now(2013), Google Chrome doesn’t support it. All other input date time related input types are supported by Google Chrome.

HTML file: month input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="month" min="2013-01" max="2013-09"/>
 <input type="submit"/>
</form>
 
</body>
</html>

Here we have a month type input field which has a minimum allowed month as 2013-01 and a maximum allowed month as 2013-09.

HTML file: date input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="date"/>
 <input type="submit"/>
</form>
 
</body>
</html>

Here we have a date input type, which shows a date picker in the UI.

HTML file: time input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="time"/>
 <input type="submit"/>
</form>
 
</body>
</html>

Here we have a time input type, we could even specify the fractional seconds. Look for the syntax at the end of this post.

HTML file: datetime input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="datetime"/>
 <input type="submit"/>
</form>
 
</body>
</html>

datetime input type which signifies Universal Time Convention(UTC).

HTML file: datetime-local input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="datetime-local"/>
 <input type="submit"/>
</form>
 
</body>
</html>

Here we have a datetime-local input type, which takes the input based on the local time zone of the user’s machine.

HTML file: week input type
index.html

< !DOCTYPE html>
<html>
<head>
<title>date picker: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
</head>
<body>
 
<form>
<label for="dt">Date: </label>
 <input name="dt" type="week"/>
 <input type="submit"/>
</form>
 
</body>
</html>

week input type gives date picker UI and allows user to select the entire date.

Form Input Type – date time: HTML5

YouTube Link: https://www.youtube.com/watch?v=VKRuSryBaNk [Watch the Video In Full Screen.]

Note:
We can specify value, min, max and step attributes for all these input types. And the format for it is as shown below:

date YYYY-MM-DD default step 60 seconds

time HH:MM:SS.FF default step 1 Day (SS.FF means seconds and fractional seconds)

datetime YYYY-MM-DDTHH:MM:SS.FFZ default step 60 seconds (T and Z means the TimeZone, these alphabets/characters must be literally present in the format)

datetime-local YYYY-MM-DDTHH:MM:SS.FF default step 60 seconds (albhabet/character/letter T must be literally present in the format)

week YYYY-WNN default step of 1 week (letter W means the week, this alphabet/characters must be literally present in the format)

month YYYY-MM default step of 1 month

range Input Type: HTML5

Browsers which support range input type know that the field is used for entering a number with in a given range.

User Interface(UI) enhancement wise, you may get a slider control to select a range of number. You can even use min, max and step attributes to provide additional control for the field – for setting the range.

HTML file
index.html

< !DOCTYPE html>
<html>
<head>
<title>range Input Type: HTML5</title>
<link href="myStyle.css" rel="stylesheet" />
<script src="myScript.js"></script>
</head>
<body>
 
<form>
<label>Range(2 to 10): </label>
 <input type="range" min="2" max="10" id="get" step="0.2" onchange="fetch()"/>
 <input type="number" min="2" max="10" step="0.2" id="put" />
 <input type="submit"/>
</form>
 
</body>
</html>

Here we have 2 input fields of type range and number respectively. Both having minimum allowed value as 2 and maximum allowed value as 10, and a step of 0.2 (fractional value). The number input field is taken for the sake of illustrating the value selected by the user using the range input field – by using(sliding) the slider.

JavaScript file
myScript.js

function fetch()
{
var get  = document.getElementById("get").value;
document.getElementById("put").value = get;
}

Here we fetch the value selected by the user using the slider and assign the value to the number input field.

CSS file associated with this is same as present at pattern and title Attribute of Form Field: HTML5

Form Input Type – range: HTML5

YouTube Link: https://www.youtube.com/watch?v=YecwKiFBt0s [Watch the Video In Full Screen.]

Note: Browsers which do not support range input type, simply fall back to text input type. However, you need to validate the user entered data at server-side for more security. Client side validation is done mainly for the sake of creating the illustration of speed of validating the data and for a better user experience.