7-functions.html

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    <title>functions in javaScript</title>
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    <script>

        //without parameters in functions
       // function bioData(){
        //    console.log("my name is "+ name);
        //    console.log("my age  is "+ age); 
        //    console.log("my city is "+ city); 


        // }
        // let name="saleem Raza"
        // let age=18;
        // let city="karachi";
        // bioData();

        //with parameters in function
        // function sum(a,b){
        //     let add=a+b;
        //     console.log("the sum of two numbers are  "+ add);

        // }
        // sum(5,6);
        // sum(7,8);
         
        // with return values in functions
        // function percentage(a,b,c,){
        //     let total=300;
        //     let per= (a+b+c)/total *100;
        //     return per
        // }
        // let p=percentage(75,85,95);
        // console.log("the percentage of three numbers are " + p +"%");


        // quick assignment compare two numbers and print greater number

        // function compare(a,b) {
        //     if(a>b){
        //         console.log("the greater number is "+ a);
        //         console.log("the smallesr number is "+b);
        //     }
        //     else{
        //         console.log("the greater number is "+b);
        //         console.log("the smallest number is "+a);

        //     }  
        // }
        // compare(78,89);
        // compare(90,100);

       
        // some mostly using string methods and function are :

        let name= "saleem";
        let friend= "raza"
        let cousin="   ali   ";
        // 1: 
        console.log(name.length); // it will return the length of the string
        //2:
        console.log(name.toUpperCase()); // it will convert the string into uppar case 
        //3:
        console.log(name.toLowerCase()); // convert into lower case
        //4:
        console.log(name.concat(" is a friend of ",friend)); // it will concatnate the string
        //5:
        console.log(name.slice(2)); // it will print the string which will start from index 2 up to the end of string index
        //6:
        console.log(name.slice(2,4));// it will print the string which will start form index 2 and end to index 3
        //7:
        console.log(cousin.trim());
        //8:
        console.log(cousin.trimEnd());
        //9:
        console.log(name.replace("saleem","muhammad")); // it will replace the string
        //10:
        console.log(name.substring(2)); // same work as slice() but the slice() functiion will take negative value also.
        //11:
        console.log(name.indexOf("m")); // it will print the index of perticular string which we mintion on round bracket of indexOf() function.

        
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