Print Table Using For-loop in C++
Multiplication Table
In mathematics, a table is created by multiplying a certain number by all of the counting numbers, i.e., 1, 2, 3, 4, 5, 6, and so on. It is also referred to as a multiplication table. Suppose, we need to create a table of the number 12, then we have to multiply 12 by each natural number as follows:
12 * 1 = 12
12 * 2 = 24
12 * 3 = 36
12 * 4 = 48
12 * 5 = 60....
What is For Loop?
A for loop is a repetitive control structure that allows you to create a loop to execute a specific number of times efficiently.
The syntax that can be used for the for loop in the C++ programming language is given below:
for (initialization statement; termination condition; increment or decrement statement (used for modifying value for further evaluation))
{
/* main body of the “for” loop */
}Algorithm to print Multiplication of Table 2:
Step 1: Start.
Step 2: Read n, res, i.
Step 3: Take a number “n” from the user to print the table.
Step 4: Use for-loop to print table. Initialize (i=1) and check condition until i becomes 12. when, the condition becomes wrong, then control moves to step 6..
Step 5: res=num*i;
Step 6: Print “res”.
Step 7: End.
Program 1:
#include<iostream>
using namespace std;
int main()
{
int num=2, i, res;
for(i=1; i<=12; i++)
{
res = num*i;
cout<<num<<" * "<<i<<" = "<<res;
cout<<endl;
}
cout<<endl;
return 0;
}Output
2 * 1 = 2
2 * 2 = 4
2 * 3 = 6
2 * 4 = 8
2 * 5 = 10
2 * 6 = 12
2 * 7 = 14
2 * 8 = 16
2 * 9 = 18
2 * 10 = 20
2 * 11 = 22
2 * 12 = 24
Explanation
The above code prints the table of 2.
The for loop is used in this program. The value of i is initialized to 1, and the condition (i<=12) is evaluates to true because (1<=12), which allows the program to enter in while loop. And, res stores the value of num*i, i.e., 2*1, i.e., 2.
Now, use the following statement:
cout<<num<<" * "<<i<<" = "<<res;
The above statement prints the first line like this 2 *1 = 2 in the output.
In the loop, cout<<endl is next statement that indicates the program will write the output from new line.
The program flow moves to the update statement which increases the value of i.
The condition i<=12 or 2<=12 evaluates to true once more. Again, control enters in the loop.
This process will continue until the condition is determined to be untrue.
The multiplication table of 2 is printed on the output screen.
Program 2: Program to print a table of any user-defined number
#include<iostream>
using namespace std;
int main()
{
int num, i, res;
cout<<"Enter the Number: ";
cin>>num;
for(i=1; i<=10; i++)
{
res = num*i;
cout<<num<<" * "<<i<<" = "<<res;
cout<<endl;
}
cout<<endl;
return 0;
}Output:
Enter a number: 10
10 * 1 = 10
10 * 2 = 20
10 * 3 = 30
10 * 4 = 40
10 * 5 = 50
10 * 6 = 60
10 * 7 = 70
10 * 8 = 80
10 * 9 = 90
10 * 10 = 100Print table from 1 to 10
Algorithm:
Step 1: Start the program.
Step 2: Read n, i=1, j=1.
Step 3: Use two for loops to print the tables. Iterate the value of i until i=10. In the inner loop iterate j until (j<=n), else go to step4.
Step 4: if (j<n-1)
Cout<<j<<”x”<<i<<i*j
Else
Cout<<j<<”x”<<i<<i*j
Step 5: End the program.
Flowchart:
Program:
#include <iostream>
using namespace std;
int main()
{
int j, i, n;
cout << "\n\n the multipliaction table from 1 to n:\n";
cout << "-------------------------------------------------------------\n";
cout << "Input the number upto 5: ";
cin >> n;
cout << "Multiplication table from 1 to " << n << endl;
for (i = 1; i <= 10; i++)
{
for (j = 1; j <= n; j++)
{
if (j <= n - 1)
cout<<j<<"x"<<i<<"="<<i*j;
else
cout<<j<<"x"<<i<< "=" <<i*j;
}
cout << endl;
}
}Output
Enter any number:
The multiplication table from 1 to 4
1x1=1 2x1=2 3x1=3 4x1=4
1x2=2 2x2=4 3x2=6 4x2=8
1x3=3 2x3=6 3x3=9 4x3=12
1x4=4 2x4=8 3x4=12 4x4=16
1x5=5 2x5=10 3x5=15 4x5=20
1x6=6 2x6=12 3x6=18 4x6=24
1x7=7 2x7=14 3x7=21 4x7=28
1x8=8 2x8=16 3x8=24 4x8=32
1x9=9 2x9=18 3x9=27 4x9=36
1x10=10 2x10=20 3x10=30 4x10=40