Jinja2 Expressions

FAQ

1. What is the use of {%...%} delimiter ?
Answer: It is used for the statements of the Jinja language that do not have an output.

2. What is the use of {{...}} delimiter ?
Answer: It is the used to print the content in between the curly brackets to the template output. 

3. What are the Math Expressions that we can use here
Answer: + Addition -> eg 20 + 30 returns 50
        - Subtraction. ->  eg 20 - 10 returns 10
        * Multiplication. ->  eg 2 * 3 returns 6
        / Division. -> eg 10 / 5 returns 2
        // Returns integer result of division rounded down, e.g. 20 // 7 returns 2.
        % Calculate the remainder of division. For instance, 11 % 7 returns 4.
        
4. Why can't we use ** power operand in jinja2 expressions?
Answer: This is because the math expression of a power operand ** is not supported. e.g.  {{ 2 ** 16 }} would not work.

 

MCQ

1. What is the symbol that we can use to interpolate expressions
    a) []
    b) {}
    c) ()
    d) None of teh above
    
Answer: b) {}


2. What is the correct syntax to interpolate exprrssions 
    a) {{ variable }}
    b) { variable }
    c) {% variable %}
    d) {{% variable %}}
    
Answer: a) {{ variable }} 


3. What is the correct syntax to perform addition in jinja2
    a) {{a}} + {{b}}
    b) {{ a+b }}
    c) { a } + { b }
    d) Both a and b 
    
Answer: b) {{ a+b }}


4. What is the correct syntax to perform string concatenation using Jinja2
    a) {{ A + B }}
    b) {{ A }} {{ B }}
    c) {{A}},{{B}}
    d) Both a and b
    
Answer: d) Both a and b


5. Suppose we have added "/" at end in convention such as  @app.route("/home/").
So, can we access the domain by writting http://127.0.0.1:5000/home
    a) Yes
    b) No
    
Answer: Yes


6. Suppose we have a convention as @app.route("/home")
Ao, can we access the domain by writting http://127.0.0.1:5000/home/
    a) Yes
    b) No
    
Answer: No