Number Left Half Pyramid Pattern

Number Left Half Pyramid Pattern Using C program

C Program:

#include<stdio.h> #include<conio.h> int main() { int num,i,j; printf("Enter the number:"); scanf("%d",&num);// get the input from the user for(i=1;i<=num;i++) { for(j=1;j<=i;j++) { printf("%d",j); } printf("\n"); } return 0; }

Output 1:

Output 2:

From the above program,

ü num is used to store the number of rows to be printed given by the user.

i	i<=num	j	j<=i	Print j	j++	Print new line	i++
1	1<=3	1	1<=1	1	2	Still in j loop
		2	2<=1 false	Doesn’t execute		Yes	2
2	2<=3	1	1<=2	1 1	2	Still in j loop
		2	2<=2	1 12	3
		3	3<=2 false	Doesn’t execute		yes	3
3	3<=3	1	1<=3	1 12 1	2	Still in j loop
		2	2<=3	1 12 12	3
		3	3<=3	1 12 123	4
		4	4<=3 False(goes out of the j loop)	Doesn’t execute		yes	4
4	4<=3 false	Doesn’t execute

ü i is the outer loop and j is the inner loop.

ü whenever j loop starts it's value will be assigned to 1.

ü j loop continues till the condition j<=i fails then only it moves to the outer loop i.

ü when j loop fails, new line will be printed then it moves to i loop.

ü when condition i<=num fails in i loop then the execution stops.

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