function and parameter in JS

Shekhar-Raj · Shekhar-Raj · commit 02bdbccd80d2 · 2024-09-17T21:06:34.000+05:30
diff --git a/03_basics/01_functions.js b/03_basics/01_functions.js
@@ -0,0 +1,53 @@
+//function is a type of keyword.
+
+function sayMyName(){
+    console.log("R");
+    console.log("A");
+    console.log("J");
+    
+}
+
+// sayMyName //only function name is called as reference.
+// sayMyName()  // This is called as execution.
+
+
+//function to add two numbers
+
+// function addTwoNumbers(num1,num2){   //**** */ here num1,num2 are called as parameters, because they are made at time of function definition.
+//     let sum=num1+num2;
+//     console.log(sum);
+    
+
+// }
+
+// addTwoNumbers(3,5)  //**values passed inside at time of function calling is called as arguemnets.
+
+function addTwoNumbers(num1,num2){   
+    // let sum=num1+num2;
+    // return sum;
+
+    //or
+
+    return num1+num2
+    
+
+}
+// const result=addTwoNumbers(3,5);
+
+// console.log("Result", result);
+
+function LoginUserMessage(username="Sam"){  // here sam is set as default value, if user does enter any username then sam name will be used as a default username.
+    if(!username){   //if(username===undefined) this is same as written in the line
+        console.log("Please enter a username");
+        return
+        
+
+    }
+    return (`${username} just logged in`)
+
+}
+
+console.log(LoginUserMessage("madhav"));     //using console.log to print the the return statement
+
+//***IMPORTANT FOR INTERVIEWS */
+// console.log(LoginUserMessage());   // if we don't pass anything in arguement the o/p ---> undefined just logged in
diff --git a/03_basics/tempCodeRunnerFile.js b/03_basics/tempCodeRunnerFile.js
@@ -0,0 +1 @@
+console.log(LoginUserMessage("samuel@453"));

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+console.log(LoginUserMessage("samuel@453"));`