On day 14, I learned the basics of conditional statements and loops and functions.
1. Conditional statements
< 1 > if statements
Use this statement to execute code only if the specified condition is true.
<2>if… Else statements
Code is executed when the condition is true (after if) and other code is executed when the condition is false (after else).
<3>if… else if… Else statements
Select one of multiple code blocks to execute
Grammar:
Condition1 (condition1) {condition1 is true} else if (condition2) {condition2 is true} else {condition1 and condition2 are not true }
2. Switch statement
Select one of the multiple code blocks to execute
Grammar:
switch(n)
{case 1: execute code block 1;
break;
Case 2: Execute code block 2;
break;
Default: code executed at different times from case 1 and case 2
}
3. For loop
Loop a code block a certain number of times
Grammar:
For (statement 1; Statements 2; Statement 3) {executed code block}
4. For /in loop
Loop over the properties of an object
5. While loop
Loops the specified code block when the specified condition is true
6. Do /while loop
The loop executes a block of code once before checking if the condition is true, and then repeats the loop if the condition is true.
Today, I did 99 times table and 100 yuan to buy 100 chickens, and tried to know the traversal cycle. I will write a summary of the knowledge point about the function tomorrow.