important terms
1.function-Subprogram called to perform a particular task.
2.Variable- identifier used to represent a single data item.
3.Parameter-Variable used to store values ,within a function.
4.Arguments-Actual values stored within a function.
3 Ways of Declaring Function
a)1.traditional way
function calAge(cyear,yob){
return cyear-yob;
}
console.log(calAge(2021,2000))
b)embedding it in a variable
const age=function calAge(cyear,yob){
return cyear-yob;
}
console.log(age(2021,2000)
c)Using Arrow
const age = (cyear, yob) => {
return cyear - yob;
}
console.log(age(2021,2000)
note
for all the above the output is 21,
parameters are those inside the function parenthesis while auguments are the 2021,2000 values within the console.log().
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