00-RelationalLogicalOperators.jl

## Comparisons

## As we saw earlier, when testing for equality we use ==

x = 1

x == 2
# false

# For “not equal” use !=
x != 3
# true

############################################################
# We can chain inequalities:

1 < 2 < 3
# true

1 <= 2 <= 3
# true
############################################################
# In many languages you can use integers or other values when testing conditions but Julia is more fussy

while 0 println("foo") end
ERROR: TypeError: non-boolean (Int64) used in boolean context
 in anonymous at no file

if 1 print("foo") end
ERROR: TypeError: non-boolean (Int64) used in boolean context

# Combining Expressions

# Here are the standard logical connectives (conjunction, disjunction)

true && false
false

true || false
true
Remember

# P && Q is true if both are true, otherwise it’s false
# P || Q is false if both are false, otherwise it’s true