multiplication in c

1#include <stdio.h>
2
3int main(){
4	//declaring variables
5    int n,i,a,start,end;
6    //taking and printing the instructions
7    printf("Enter first number from where you want to start multiplication : \n");
8    scanf("%d",&start);
9     printf("Enter Last number from where you want to end multiplication : \n");
10    scanf("%d",&end);
11  	//using loops
12
13    for(n=start;n<=end;n++){
14        a=0;
15        for(i=1;i<=10;i++){
16            a+=n; //setting the value of a. i used addition instead of multiplication
17          //because computer takes too much time for multiplating numbers than doing addition
18          
19            printf("%d x %d = %d\n",n,i,a);
20
21        }
22        printf("Multiplication has ended of %d\n\n",n);
23    }
24
25
26    return 0;
27
28
29}
30

1#include <stdio.h>
2int main()
3{
4    // declaring table
5    int table[10][10];
6
7
8    int sum = 0;
9    // loop
10    for(int i = 0; i < 10; i++){
11        printf("%d table starting \n\n",i + 1);
12        for(int j = 0; j < 10; j++){
13             // using addition instead of multiply for better performance
14            sum += (i + 1);
15            //
16            table[i][j] = sum;
17            // printing table
18            printf("%d x %d = %d \n",i + 1,j + 1,table[i][j]);
19        }
20        sum = 0;
21        printf("\n");
22    }
23
24}

1//use the "*"
2
3/*var*/ * /*var*/;

1/*Program for multiplying two numbers*/
2#include <stdio.h>
3int main(){
4	int a, b, Product; //declare the variables that will be used, a will store the first number, b second number and Product, product.
5    printf("Enter the first number: \n"); //Prompts user to enter the first number.
6    scanf("%d", &a);//Accepts input and saves it to variable a
7    printf("Enter the second number: \n");
8    scanf("%d", &b);
9    sum = a * b; //Formular to multiply the two numbers.
10    printf("Product is %d\n", product);
11}

1// Program to multiply 2 numbers from user inputs
2
3#include <stdio.h>
4int main() {
5    double a, b, product;
6    printf("Enter two numbers: ");
7    scanf("%lf %lf", &a, &b);  
8 
9    // Calculating product
10    product = a * b;
11
12    // Result up to 2 decimal point is displayed using %.2lf
13    printf("Product = %.2lf", product);
14    
15    return 0;
16}
17

1int num1,num2;
2printf("%d",num1*num2);