11-conditional_statement.md

Why use conditinol statement:

Conditional statements different conditions ke base pr different actions perform krne ke lie use me aate hain

JavaScript me niche diye hue conditional statements use hote hain:

• if block ka use koi condition true hone pr jo code execute krna hai uske lie kia jata hai.

• else block ka use koi condition false hone pr jo code execute krna hai uske lie kia jata hai.

• Use else if to specify a new condition to test, if the first condition is false

let i = 10;
if (i < 20) {
  console.log("Yes");
}

For a conditional statement if block is mandatory, without if block we can not write else if or else block. It means else if and else block are not mandatory.

if (i < 20) {
  console.log("Yes");
} else if (i === 10) {
  console.log("Yes 10");
} else {
  console.log("No");
}

• Grouping multiple conditions using logical operator && and ||

let j = 10;
let k = 20;
if ((j < 20 && k > 10) || j + 10 === 20) {
  console.log(true);
} else {
  console.log(false);
}

==========if==========

if statemant ka use tab hota jad hum sure ho ki condition true ha.false bhi ho skti hai but normally true ka leya he use hota hai.

• Sayntax:

if (condition) {
console.log(true);
}

let marks = 100;
if (marks == 100) {
console.log("pass");
}

Conditional statements bananay ka leya if condition jaruri hai.if condition ka bad hum ak ya ak sa jyada else if add kar sktay hai.or last ma else add kar sktay hai.else if or else jaruri nahi hai.

==========if......else==========

else statemant ka use tab hota jad hum sure ho ki condition true ha.

• Sayntax:

if (condition) {
console.log(true);
} else {
console.log(false);
}

let x = 20;
if (x > 10) {
console.log(true);
} else {
console.log(false);
}