calculator.vp

# Simple Calculator in Viper
# Demonstrates arithmetic operations, for loops, and comparisons

# Calculate factorial using a for loop
print(5)  # Calculate 5!
result = 1
for (i in range(5)) {
    if (i > 0) {
        result = result * i
    }
}
print(result)  # Should print 24 (5! = 5*4*3*2*1 but we start from 0)

# Fix the factorial calculation
fact = 1
for (i in range(6)) {
    if (i > 1) {
        fact = fact * i
    }
}
print(fact)  # Should print 120 (5! = 5*4*3*2*1)

# Demonstrate comparison operators
a = 10
b = 5

# Addition
sum = a + b
print(sum)  # 15

# Subtraction
diff = a - b
print(diff)  # 5

# Multiplication
product = a * b
print(product)  # 50

# Division
quotient = a / b
print(quotient)  # 2

# Comparison demonstrations
if (a > b) {
    print(1)  # True: 10 > 5
}

if (a < b) {
    print(0)  # Won't execute: 10 < 5 is false
} else {
    print(2)  # This will execute
}

if (a == b) {
    print(3)  # Won't execute: 10 == 5 is false
} else {
    print(4)  # This will execute
}

if (a != b) {
    print(5)  # True: 10 != 5
}

# Power calculation using repeated multiplication
base = 2
exponent = 3
power = 1
for (i in range(exponent)) {
    power = power * base
}
print(power)  # Should print 8 (2^3)

# Sum of numbers from 1 to 10
total = 0
for (i in range(11)) {
    if (i > 0) {
        total = total + i
    }
}
print(total)  # Should print 55