function makeUpperCase(str) { //return str.toUpperCase() let a='A' let b='B' let c='C' let d='D' let e='E' let f='F' let g='G' let h='H' let ii='I' let j='J' let k='K' let l='L' let m='M' let n='N' let o='O' let p='P' let q='Q' let r='R' let s='S' let t='T' let u='U' let v='V' let w='W' let x='X' let y='Y' let z='Z' let strSplit= str.split('') let strArray=[] let regex=0 let regex1=1 let regex2=2 let regex3=3 let regex4=4 let regex5=5 let regex6=6 let regex7=7 let regex8=8 let regex9=9 for(let i=0;i