Python Daily Question - 131
Python Daily Question - 131
Step-by-Step Explanation
1. Initialization:
a = 2
a is set to 2.
2. Outer Loop:
for i in range(1, 3):
This loop iterates with i taking values from 1 to 2 (range(1, 3) generates [1, 2]).
3. Inner Loop Initialization:
b = a - 1
b is set to a - 1, which is 2 - 1 = 1.
4. Inner Loop:
while b greater than or equal to 0:
This loop continues as long as b is greater than or equal to 0.
5. Inner Loop Body:
c = " " * b
d = "* " * i
b = b - 1
c is set to a string of b spaces.
d is set to a string of i repetitions of "* ".
b is decremented by 1.
6. Print Statement:
print(c + d)
This prints the concatenated string of c and d.
Execution Trace and Output
First Iteration of Outer Loop (i = 1):
b starts at 1.
b = 1: c = " " * 1 → " ", d = "* " * 1 → "* ", b decrements to 0.
b = 0: c = " " * 0 → "", d = "* " * 1 → "* ", b decrements to -1.
The last values of c and d in the loop are used in the print statement:
Output: *
Second Iteration of Outer Loop (i = 2):
b starts at 1.
b = 1: c = " " * 1 → " ", d = "* " * 2 → "* * ", b decrements to 0.
b = 0: c = " " * 0 → "", d = "* " * 2 → "* * ", b decrements to -1.
The last values of c and d in the loop are used in the print statement:
Output: * *
Final Output:
*
*
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