Pattern 41: Print Numbers pattern program in C

Enter how many rows you want : 10
1
1 0
1 0 1
1 0 1 0
1 0 1 0 1
1 0 1 0 1 0
1 0 1 0 1 0 1
1 0 1 0 1 0 1 0
1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0

Print Numbers Pattern Program Logic:

• We need two For loops, The Outer for loop and Inner for loop.  The Outer for loop helps us to track the rows and Inner for loop is useful to track the column values.
• The outer for loop will iterate from the ‘1’ to the number of rows i.e ‘n’
• The Inner for loop goes from 1 to ‘i’ ( Here ‘i’ is the outer loop iterator ) So stopping inner loop once we reached ‘i’ creates the Triangle shape.
• Now we got the desired shape, We need to print the values now
• If we see above example Patterns, Each row always starts with 1 and then second value is opposite to it i.e 0. And third value is opposite to 0. which is  1 and so on
• So We need to start the each row value with 1 and then Apply Logical Not Operator (!)  on the values for each iteration to get the desired value.
• Which will give us 1 0 1 0 .. etc pattern. And we need stop the inner loop once we reached the ( j<=i ) ( Here ‘j’ is inner loop iterator and ‘i’ is Outer loop iterator)

 Also Check All Pattern Programs:

• Come Together – The Collection of all Pattern Programs in C Programming

Program to print numbers pattern:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

#include<stdio.h> int main() {     int i,j,k,n;          // Take input number of Rows from the User     printf("Enter how many rows you want : ");     scanf("%d", &n);       // Iterate from 1 to 'n' to create the 'n' of rows     for(i=1; i<=n; i++)     {         // Take a number 'k' to track the values of '1's and '0's         k=0;           // Inner Loop will go from 1 to 'i' ( 'i' is outer loop iterator)         for(j=1; j<=i; j++)         {             // We need start with 1, So apply Logical Not('!') Operator             // Which converts k from '0' --> '1'             // So print that converted value.             // Repeat for all iterations             k = !k;             printf(" %d", k);         }         printf("\n");     }     return 0; }

Program Output:

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