October 22, 2023, Learn eTutorial

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A number or integer is said to be **divisible** by **5** or any other number '**n**' if the **remainder** of that division operation is **0**.

To determine all numbers in a given range are divisible by five, we **take each number in that range and calculate that number mod 5**. After the division, if the remainder is zero, then that integer is divisible by 5. Then we will add that integer to the **sum variable** and increment the** count**.

Let us take an example "**5, 10, 15**." take the **Mod** of these numbers with **5**, and if we get the remainder as zero then that number is divisible by 5. **The same logic can be applied to check any number divisibility.**

**Simple Program: **C Program to check whether a number is divisible by 5 or not**.**

This is a C Program, we declare the variables **count**, **Sum**, etc. as integers. Now we open a '`for loop`

' from the Lower limit to the Upper limit values, which we receive from the user. Inside the '`for loop`

', we take each number and do **Mod** operation; if the remainder is** zero**, increment **count** with **one** and add **Sum** equal to **Sum + that integer**. Print that as an Integer divisible by** **five.

**STEP 1:** Include the Header files to include the Libraries which have built-in functions defined in the C program library.

**STEP 2:** Start the program execution by using the **main()** function. We define the Main function operating `Void`

, which means no return value.

**STEP 3:** Declare and Initialize the variables using `int`

Data type.

**STEP 4:** Accept the values from the user for the Lower and Upper limit using the `printf`

and `scanf`

.

**STEP 5:** Use a '`for loop`

' from Lower limit to Upper limit increment by **1** to check each element is a divisor of **5**.

**STEP 6:** Use an '`if`

** **'condition to check the integer **Mod 5** is **zero** or not.

**STEP 7:** If the remainder is **zero**, then increment the count by **one**, and print the integer as the divisor of **5**.

**STEP 8:** add that number to the **Sum** in each iteration of the Loop.

**STEP 9:** Print the **Sum** and the numbers and the Count using `printf`

.

To check the number divisibility program, we are using the below C topics, we recommend learning these topics for a better understanding

` ````
#include <stdio.h>
void main()
{
int i, N1, N2, count = 0, sum = 0; /* declares count, sum and two variables as integer */
printf("Enter the value of N1 and N2\n"); /* user gives the value for lower and upper range */
scanf("%d %d", & N1, & N2);
printf("Integers divisible by 5 are\n"); /*Count the number and compute their sum*/
for (i = N1; i < N2; i++)
{
if (i % 5 == 0)
{
printf("%d,", I); /*using mod operator check the number is divisible by 5*/
count++;
sum = sum + I; /*add the numbers divisible by 5 to sum variable*/
}
}
printf("\nNumber of integers divisible by 5 between %d and %d = %d\n",
N1, N2, count);
printf("Sum of all integers that are divisible by 5 = %d\n", sum); /* displays the output of program */
}
```

Enter the value of N1 and N2 2 27 Integers divisible by 5 are 5, 10, 15, 20, 25, Number of integers divisible by 5 between 2 and 27 = 5 Sum of all integers that are divisible by 5 = 75