changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does change the first element 42 julia> a = 3.14159 # a is now the name of a different object 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: 42 numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does change the first element 42 julia> a = 3.14159 # a is now the name of a different object 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: 42 numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does change the first element 42 julia> a = 3.14159 # a is now the name of a different object 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: 42 numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does change the first element 42 julia> a = 3.14159 # a is now the name of a different object 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: 42 numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does change the first element 42 julia> a = 3.14159 # a is now the name of a different object 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: 42 numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does first element 42 julia> a = 3.14159 # a is now the name of a different objectCHAPTER 4. VARIABLES 14 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does first element 42 julia> a = 3.14159 # a is now the name of a different objectCHAPTER 4. VARIABLES 14 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does first element 42 julia> a = 3.14159 # a is now the name of a different objectCHAPTER 4. VARIABLES 14 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does first element 42 julia> a = 3.14159 # a is now the name of a different objectCHAPTER 4. VARIABLES 14 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction

changed: julia> a = [1,2,3] # an array of 3 integers 3-element Vector{Int64}: 1 2 3 julia> b = a # both b and a are names for the same array! 3-element Vector{Int64}: 1 2 3 Here, the line b = a does first element 42 julia> a = 3.14159 # a is now the name of a different objectCHAPTER 4. VARIABLES 14 3.14159 julia> b # b refers to the original array object, which has been mutated 3-element Vector{Int64}: numeric types: Expression Name Description +x unary plus the identity operation -x unary minus maps values to their additive inverses x + y binary plus performs addition x - y binary minus performs subtraction