Logic Building/Phase 1 - Level 5: Creative / Tricky Logical Scenarios/Program

Check Arithmetic Progression

Take three numbers and check if they are in arithmetic progression.

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Logic Building
# Take three numbers
a = float(input("Enter first number: "))
b = float(input("Enter second number: "))
c = float(input("Enter third number: "))

# Check AP
if (b - a) == (c - b):
    print("Arithmetic progression")
else:
    print("Not an arithmetic progression")

Output

Enter first number: 2
Enter second number: 4
Enter third number: 6
Arithmetic progression

Enter first number: 2
Enter second number: 5
Enter third number: 6
Not an arithmetic progression

In AP, difference between consecutive terms is constant.

Key Concepts:

  • Check if (b - a) == (c - b)
  • Common difference must be same
  • Simple equality check
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