Julia: if-elseif-else statement

if statement

“if” tell the program execute the section of code when the condition evaluates to true.

Synatx

if(Condition)

         statement1

         statement2

         …..

         …..

         statementN

end

julia> a=10;

julia> if(a==10)

           println("a is even number")

           print("a is equal to 10")

       end
a is even number
a is equal to 10

if-else statement

If the condition true, then if block code executed. other wise else block code executed.

Synatx

if(condition)

         statement1

         statement2

         …..

         …..

         statementN

else

         statement1

         statement2

         …..

         …..

         statementN

end

julia> a=10;

julia> if(a==10)

           println("a is even number")

           println("a is 10")

       else

           println("a is odd number")

           println("a is not zero")

       end
a is even number
a is 10

if-elseif-else statement

By using if-elseif-else construct, you can choose number of alternatives.

An if statement can be followed by an optional elseif...else statement, which is very useful to test various conditions

if(condition)

         statements

elseif(condition)

         statements

….

….

else

         statements

end

julia> day=3;

julia> if(day==1)

           println("Monday")

       elseif(day==2)

           println("Tuesday")

       elseif(day==3)

           println("Wednesday")

       elseif(day==4)

           println("Thursday")

       elseif(day==5)

           println("Friday")

       elseif(day==6)

           println("Saturday")

       elseif(day==7)

           println("Sunday")

       else

           println("Invalid number")

       end
Wednesday

Every expression in Julia returns a value, it is same with if condition also.
julia> number=10;

julia> result=if(num%2==0)

                   "Even Number"

               else

                   "Odd Number"

               end
"Even Number"

julia> result
"Even Number

Note

Parentheses around the condition are not needed, using of them improves readability.

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