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fun/examples/expressions_test.fun

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Standard ML
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#!/usr/bin/env fun
// Expressions test: arithmetic, precedence, comparisons, logical ops, unary, parentheses.
print("=== Expressions test start ===")
// Typed declarations
number a = 2
number b = 3
number n = 10
string s = "Have fun!"
boolean flag = true
// Arithmetic and precedence
number sum = a + b * 5 - 1
print(sum) // expect 2 + 3*5 - 1 = 16
number calc = (a + b) * (b - a + 1)
print(calc) // expect (2+3)*(3-2+1) = 5*2 = 10
// Unary operators
number neg = -n
print(neg) // expect -10
number modv = n % 3
print(modv) // expect 1
// Booleans and logical ops
print(!false) // expect 1 (true)
print(true && false) // expect 0 (false)
print(true || false) // expect 1 (true)
// Comparisons and strings
print(n > 5) // expect 1
print(s != "") // expect 1
// Mixed logical/relational
print(a < b && n >= 10) // expect 1
print((a + b) == 5 && flag) // expect 1
print("=== Expressions test end ===")