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Basic-Programs-Python/Programs/double_arrow_pattern.py at master · Akshara604/Basic-Programs-Python · GitHub

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# Python3 implementation of the approach

# Function to print the requried pattern

def drawPattern(N) :

n = N;

row = 1;

# 'nst' is the number of values

nst = 1;

# 'nsp' is the number of spaces

nsp1 = n - 1;

nsp2 = -1;

val1 = row;

val2 = 1;

while (row <= n) :

# Here spaces are printed

# 'csp' is the count of spaces

csp1 = 1;

while (csp1 <= nsp1) :

print(" ",end= " ");

csp1 = csp1 + 1;

# Now, values are printed

# 'cst' is the count of stars

cst1 = 1;

while (cst1 <= nst) :

print(val1,end = " ");

val1 = val1 - 1;

cst1 = cst1 + 1;

# Again spaces have to be printed

csp2 = 1;

while (csp2 <= nsp2) :

print(" ",end = " ");

csp2 = csp2 + 1;

# Again values have to be printed

if (row != 1 and row != n) :

cst2 = 1;

while (cst2 <= nst) :

print(val2,end = " ");

val2 = val2 + 1;

cst2 = cst2 + 1;

print()

# Move to the next row

if (row <= n // 2) :

nst = nst + 1;

nsp1 = nsp1 - 2;

nsp2 = nsp2 + 2;

val1 = row + 1;

val2 = 1;

else :

nst = nst - 1;

nsp1 = nsp1 + 2;

nsp2 = nsp2 - 2;

val1 = n - row;

val2 = 1;

row = row + 1;

# Driver code

if __name__ == "__main__" :

# Number of rows

N = 7;

drawPattern(N);

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