nim-by-example/content/if_else_while.md

title
If, Else, While

If, Else, While

Nim has many different control flow constructs, including the standard ifs, elses, and whiles. However, Nim does not use an else if construct like many languages, it uses a more condensed elif.

When inside a loop, continue can be used to skip the rest of the loop body and to begin the next iteration; break can be used to immediately leave the loop body.

Along with its other uses, the block statement can be used to create a label so that it's possible to break out of nested loops.

``` nim

import strutils, math

randomize() let answer = random(10) + 1 while true: echo "I have a number from 1 to 10, what is it? " let guess = parseInt(stdin.readLine)

if guess < answer: echo "Too low, try again" elif guess > answer: echo "Too high, try again" else: echo "Correct!" break

block busyloops: while true: while true: break busyloops