Functions are called by name with parentheses containing the argument.
name(argument)
func square(x) x * x print(square(5)) # Output: 25
func add(x) x + 5 func mul(x) x * 2 result = add(mul(10)) print(result) # Output: 25
func square(x) x * x print(square(3 + 2)) # Output: 25
print("Hello")
print(42)
print([1, 2, 3])
arr = [1, 2, 3, 4, 5] print(length(arr)) # Output: 5
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