# Python Program to Print 1 and 0 in Alternative Rows

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Given the number of rows and columns, the task is to print 1 and 0 in alternative rows in C, C++, and Python.

Examples:

Example1:

Input:

given number of rows =4
given number of columns=3

Output:

1 1 1
0 0 0
1 1 1
0 0 0

Example2:

Input:

given number of rows =7
given number of columns=15

Output:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

## Program to Print 1 and 0 in Alternative Rows in C, C++, and Python

Below are the ways to print 1 and 0 in alternative rows in C, C++, and Python.

If you look closely at the pattern, you’ll see that for all odd rows, 1 is printed and for all even rows, 0 is printed. As a

result, before displaying integers inside the inner loop, you must check for even-odd conditions. If the current row is

an odd number, print 1 otherwise, print 0.

The following is a step-by-step description of the logic used to print a 1, 0 number pattern at alternate rows.

### Method #1: Using For loop

Approach:

• Give the number of rows and number of columns as static input.
• Store them in two separate variables row numbers and column numbers.
• Run an outer loop from 1 to rows to iterate through the rows using For loop.
• Iterate through the columns from 1 to cols using another For inner loop.
• Before printing any number, we must first check the condition inside the inner loop.
• This means that for every odd row, 1 is displayed, and for every even row, 0 is displayed.
• We check whether the row is odd or not using the if statement.
• If it is true then print 1 else print 0.
• The Exit of the Program.

1) Python Implementation

Below is the implementation:

# Give the number of rows and number of columns as static input.
# Store them in two separate variables row numbers and column numbers.
rownumbs = 15
colnumbs = 11
# Run an outer loop from 1 to rows to iterate through the rows using For loop.
for m in range(1, rownumbs+1):
# Iterate through the columns from 1 to cols using another For inner loop.
for n in range(1, colnumbs+1):
# Before printing any number, we must first check the condition inside the inner loop.
# This means that for every odd row, 1 is displayed, and for every even row, 0 is displayed.
# We check whether the row is odd or not using the if statement.
# If it is true then print 1 else print 0.
if(m % 2 == 1):
print('1', end=' ')
# If it is true then print 1 else print 0.
else:
print('0', end=' ')
print()


Output:

1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1

2) C++ Implementation

It is the same as the python approach but just the change in syntax.

Below is the implementation:

#include <iostream>
using namespace std;

int main()
{
// Give the number of rows and number of columns as
// static input.
// Store them in two separate variables row numbers and
// column numbers.
int rownumbs = 15;
int colnumbs = 11;
// Run an outer loop from 1 to rows to iterate through
// the rows using For loop.
for (int i = 1; i <= rownumbs; i++) {
// Iterate through the columns from 1 to cols using
// another For inner loop.
for (int j = 1; j <= colnumbs; j++) {
// Before printing any number, we must
// first check the condition inside the
// inner loop.
// This means that for every odd row, 1 is
// displayed, and for every even row,
// 0 is displayed.
// We check whether the row is odd or not using
// the if statement.
// If it is true then print 1 else print 0.

if (i % 2 == 1)
cout << "1 ";
// If it is true then print 1 else print 0.
else
cout << "0 ";
}
cout << endl;
}
return 0;
}

Output:

1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1

3) C Implementation

It is the same as the python approach but just the change in syntax.

Below is the implementation:

#include <stdio.h>

int main(void)
{
// Give the number of rows and number of columns as
// static input.
// Store them in two separate variables row numbers and
// column numbers.
int rownumbs = 15;
int colnumbs = 11;
// Run an outer loop from 1 to rows to iterate through
// the rows using For loop.
for (int i = 1; i <= rownumbs; i++) {
// Iterate through the columns from 1 to cols using
// another For inner loop.
for (int j = 1; j <= colnumbs;
j++) { // Before printing any number, we must
// first check the condition inside the
// inner loop.
// This means that for every odd row, 1 is
// displayed, and for every even row, 0 is
// displayed.
/*We check whether the row is odd or not using
the if statement. If it is true then print 1
else print 0.*/
if (i % 2 == 1)
printf("1 ");
// If it is true then print 1 else print 0.
else
printf("0 ");
}
printf("\n");
}
return 0;
}

Output:

1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1

### Method #2: Using while loop

1) C Implementation

We just iterate till rownumbs and columumbs using a while loop.

Below is the implementation:

#include <stdio.h>

int main(void)
{
// Give the number of rows and number of columns as
// static input.
// Store them in two separate variables row numbers and
// column numbers.
int rownumbs = 4;
int colnumbs = 3;
// Run an outer loop from 1 to rows to iterate through
// the rows using For loop.
int temprow = 1;
while (temprow <= rownumbs) {
// Iterate through the columns from 1 to cols using
// another For inner loop.
int tempcol = 1;
while (tempcol <= colnumbs) { // Before printing any
// number, we must
// first check the condition inside the
// inner loop. This means that for every odd
// row, 1 is displayed, and for every even row,
// 0 is displayed. # We check whether the row is
// odd or not using the if statement. # If it is
// true then print 1 else print 0.
if (temprow % 2 == 1)
printf("1 ");
// If it is true then print 1 else print 0.
else
printf("0 ");
tempcol++;
}
temprow++;
printf("\n");
}
return 0;
}

Output:

1 1 1
0 0 0
1 1 1
0 0 0

2) C++ Implementation:

We just iterate till rownumbs and columumbs using a while loop.

Below is the implementation:

#include <iostream>
using namespace std;

int main(void)
{
// Give the number of rows and number of columns as
// static input.
// Store them in two separate variables row numbers and
// column numbers.
int rownumbs = 2;
int colnumbs = 19;
// Run an outer loop from 1 to rows to iterate through
// the rows using For loop.
int temprow = 1;
while (temprow <= rownumbs) {
// Iterate through the columns from 1 to cols using
// another For inner loop.
int tempcol = 1;
while (tempcol <= colnumbs) { // Before printing any
// number, we must
// first check the condition inside the
// inner loop. This means that for every odd
// row, 1 is displayed, and for every even row,
// 0 is displayed. # We check whether the row is
// odd or not using the if statement. # If it is
// true then print 1 else print 0.
if (temprow % 2 == 1)
cout << "1 ";
// If it is true then print 1 else print 0.
else
cout << "0 ";
tempcol++;
}
temprow++;
cout << endl;
}
return 0;
}

Output:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

3) Python Implementation

We just iterate till rownumbs and columumbs using a while loop.

Below is the implementation:

# Give the number of rows and number of columns as static input.
# Store them in two separate variables row numbers and column numbers.
rownumbs = 6
colnumbs = 11
# Run an outer loop from 1 to rows to iterate through the rows using For loop.
temprow = 1
while(temprow <= rownumbs):
# Iterate through the columns from 1 to cols using another For inner loop.
tempcol = 1
while(tempcol <= colnumbs):
# Before printing any number, we must first check the condition inside the inner loop.
# This means that for every odd row, 1 is displayed, and for every even row, 0 is displayed.
# We check whether the row is odd or not using the if statement.
if(temprow % 2 == 1):
print('1', end=' ')
# If it is true then print 1 else print 0.
else:
print('0', end=' ')
tempcol += 1
temprow += 1
print()


Output:

1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0 0

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