C Program - Multiplication Table of a Numbers in a Given Range

This C code block is a program that prints the multiplication table for a given starting number and stopping number.  

#include <stdio.h>

int main()
{

    int num1, num2;

    printf("Enter Starting Point: \n");
    scanf("%d", &num1);

    while (num2 <= 0)
    {
        printf("Enter Stoping Point: \n");
        scanf("%d", &num2);
    }

    printf("Multiplication rable for %d and %d \n", num1, num2);

    for (int x = 1; x <= num2; x++)
    {
        printf("%d * %d = %d \n", num1, x, num1 * x);
    }

    return 0;
}

Result: 

Enter Starting Point:
5
Enter Stoping Point:
15
Multiplication rable for 5 and 15
5 * 1 = 5
5 * 2 = 10
5 * 3 = 15
5 * 4 = 20
5 * 5 = 25
5 * 6 = 30
5 * 7 = 35
5 * 8 = 40
5 * 9 = 45
5 * 10 = 50
5 * 11 = 55
5 * 12 = 60
5 * 13 = 65
5 * 14 = 70
5 * 15 = 75

Process returned 0 (0x0)   execution time : 5.813 s
Press any key to continue.

Let's go through it line by line: 

#include <stdio.h>

This line includes the standard input/output header file. 

int main()
{

This line defines the main function of the program. 

    int num1, num2;

This line declares two integer variables num1 and num2 which will be used to store the starting and stopping points of the multiplication table. 

    printf("Enter Starting Point: \n");
    scanf("%d", &num1);

These lines prompt the user to enter the starting point of the multiplication table and store it in the variable num1 using the scanf() function. 

    while (num2 <= 0)
    {
        printf("Enter Stoping Point: \n");
        scanf("%d", &num2);
    }

These lines prompt the user to enter the stopping point of the multiplication table and store it in the variable num2 using the scanf() function. If the user enters a non-positive number, the program will continue prompting the user until a positive number is entered. 

    printf("Multiplication rable for %d and %d \n", num1, num2);

This line prints the starting and stopping points of the multiplication table. 

    for (int x = 1; x <= num2; x++)
    {
        printf("%d * %d = %d \n", num1, x, num1 * x);
    }

These lines use a for loop to iterate through each number in the multiplication table, from 1 to num2. For each number, the program calculates the product of num1 and the current number and prints it in the format of num1 * x = product. 

    return 0;
}

This line indicates the end of the main() function and returns 0, indicating that the program has executed successfully.